Climate and average weather in Khorramshahr
In Khorramshahr, the summers are sweltering, dry, and clear and the winters are mild and mostly clear.
Over the course of the year, the temperature in Khorramshahr typically varies from 9°C to 47°C, and is rarely below 4°C or above 50°C. July is the hottest month of the year, while January is the coldest.
Based on the travel score, the best times of year to visit Khorramshahr for warm-weather activities are from early January to late March and mid November to late December.
- Hottest
- Jul
- 47°
- Coldest
- Jan
- 9°
- Wettest
- Nov
- 41 mm
- Driest
- Jul
- 0 mm
- Rain / yr
- 183 mm
- 24 wet days
- Daylight
- 10.0–14.0 h
- shortest–longest
- Elevation
- 4 m
- 30.4°N
- Clearest
- Jul
- 2% cloud
Khorramshahr is city in Khuzestan Province, Iran.
- Density
- 3,912/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Khorramshahr weather by month, at a glance
The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.
Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around early January to late March.
Temperature through the year
Daily average highs and lows in Khorramshahr, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 4.6 months, from May 14 to October 1, with daily high temperatures above 40°C. The hottest month of the year in Khorramshahr is July, with an average high of 47°C and low of 32°C.
The cool season lasts 3.1 months, from November 25 to February 26, with daily high temperatures below 24°C. The coldest month of the year in Khorramshahr is January, with an average low of 9°C and high of 19°C.
Days typically run about 13°C warmer than nights, with the widest day–night swing (around 16°C) in September.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 19 | 22 | 27 | 34 | 41 | 45 | 47 | 47 | 43 | 36 | 27 | 20 |
| Avg low (°C) | 9 | 11 | 15 | 21 | 27 | 30 | 32 | 31 | 27 | 22 | 15 | 10 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 19 | 9 |
| Feb | 22 | 11 |
| Mar | 27 | 15 |
| Apr | 34 | 21 |
| May | 41 | 27 |
| Jun | 45 | 30 |
| Jul | 47 | 32 |
| Aug | 47 | 31 |
| Sep | 43 | 27 |
| Oct | 36 | 22 |
| Nov | 27 | 15 |
| Dec | 20 | 10 |
How hot and cold Khorramshahr really feels
The felt-temperature range through the year — heat index on the day's high (summer humidity), wind chill on the night's low (winter wind). The dashed lines are the plain thermometer; the gap is how much hotter or colder it really feels.
On the hottest afternoons, once humidity is folded in, Khorramshahr feels like about 47°C (around July 25). About 206 days a year carry some heat stress, and 149 of them tip into dangerous heat (feels-like above 39°C), peaking in July.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°C) | 19 | 22 | 27 | 34 | 41 | 45 | 47 | 47 | 43 | 36 | 27 | 20 |
| Air high (°C) | 19 | 22 | 27 | 34 | 41 | 45 | 47 | 47 | 43 | 36 | 27 | 20 |
| Feels-like low (°C) | 7 | 10 | 15 | 21 | 26 | 30 | 32 | 31 | 27 | 22 | 15 | 10 |
| Air low (°C) | 9 | 11 | 15 | 21 | 27 | 30 | 32 | 31 | 27 | 22 | 15 | 10 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | 19 | 19 | 7 | 9 |
| Feb | 22 | 22 | 10 | 11 |
| Mar | 27 | 27 | 15 | 15 |
| Apr | 34 | 34 | 21 | 21 |
| May | 41 | 41 | 26 | 27 |
| Jun | 45 | 45 | 30 | 30 |
| Jul | 47 | 47 | 32 | 32 |
| Aug | 47 | 47 | 31 | 31 |
| Sep | 43 | 43 | 27 | 27 |
| Oct | 36 | 36 | 22 | 22 |
| Nov | 27 | 27 | 15 | 15 |
| Dec | 20 | 20 | 10 | 10 |
Average hourly temperature in Khorramshahr
A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on July afternoons, near 47°C, and coldest before dawn in January, near 9°C.
Khorramshahr weather by month
Every month at a glance. Click a month for its detailed page.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 19° / 9° | 38 | 5.3 | 10.3 | 7.1 |
| Feb | 22° / 11° | 21 | 3.4 | 10.9 | 8.1 |
| Mar | 27° / 15° | 25 | 3.4 | 11.8 | 7.8 |
| Apr | 34° / 21° | 10 | 1.9 | 12.7 | 4.0 |
| May | 41° / 27° | 4 | 0.7 | 13.5 | 0.4 |
| Jun | 45° / 30° | 0 | 0.1 | 13.9 | 0.0 |
| Jul | 47° / 32° | 0 | 0.1 | 13.8 | 0.0 |
| Aug | 47° / 31° | 0 | 0.1 | 13.1 | 0.0 |
| Sep | 43° / 27° | 0 | 0.1 | 12.2 | 0.0 |
| Oct | 36° / 22° | 6 | 0.7 | 11.3 | 2.4 |
| Nov | 27° / 15° | 41 | 3.7 | 10.5 | 7.5 |
| Dec | 20° / 10° | 37 | 4.8 | 10.1 | 7.6 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Khorramshahr gets about 183 mm of precipitation a year. On a typical day the chance of rain is mostly dry, but that rises and falls sharply with the seasons.
The wetter season lasts 5.5 months, from around Oct 30 to Apr 15, peaking in January at about 18% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jun 29.
November is the wettest month by volume, with 41 mm over about 4 wet days; July is the driest, with 0 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 16 | 12 | 11 | 7 | 2 | 1 | 0 | 0 | 0 | 3 | 12 | 16 |
| Rain days | 5 | 3 | 3 | 2 | 1 | 0 | 0 | 0 | 0 | 1 | 4 | 5 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 16 | 5 |
| Feb | 12 | 3 |
| Mar | 11 | 3 |
| Apr | 7 | 2 |
| May | 2 | 1 |
| Jun | 1 | 0 |
| Jul | 0 | 0 |
| Aug | 0 | 0 |
| Sep | 0 | 0 |
| Oct | 3 | 1 |
| Nov | 12 | 4 |
| Dec | 16 | 5 |
Monthly rainfall
Over a full year, Khorramshahr collects about 183 mm of rain across 24 wet days — roughly 15 mm in an average month.
It doesn’t fall evenly. November is the wettest month with 41 mm, while July is the driest at just 0 mm. The three wettest months alone bring about 63% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 38 | 21 | 25 | 10 | 4 | 0 | 0 | 0 | 0 | 6 | 41 | 37 |
| Rain days | 5 | 3 | 3 | 2 | 1 | 0 | 0 | 0 | 0 | 1 | 4 | 5 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 38 | 5 |
| Feb | 21 | 3 |
| Mar | 25 | 3 |
| Apr | 10 | 2 |
| May | 4 | 1 |
| Jun | 0 | 0 |
| Jul | 0 | 0 |
| Aug | 0 | 0 |
| Sep | 0 | 0 |
| Oct | 6 | 1 |
| Nov | 41 | 4 |
| Dec | 37 | 5 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Khorramshahr, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.
The clearer part of the year begins around May 19 and lasts for 5.3 months, ending around October 25. The clearest month is July, when the sky is clear, mostly clear, or partly cloudy 100% of the time on average.
The cloudier part of the year begins around October 26 and lasts for 6.7 months, ending around May 18. The cloudiest month is January, when it is overcast or mostly cloudy 30% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 70 | 77 | 77 | 75 | 84 | 99 | 100 | 100 | 99 | 91 | 76 | 72 |
| Cloudier (%) | 30 | 23 | 23 | 25 | 16 | 1 | 0 | 0 | 1 | 9 | 24 | 28 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 70 | 30 |
| Feb | 77 | 23 |
| Mar | 77 | 23 |
| Apr | 75 | 25 |
| May | 84 | 16 |
| Jun | 99 | 1 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 99 | 1 |
| Oct | 91 | 9 |
| Nov | 76 | 24 |
| Dec | 72 | 28 |
Daylight, sunrise and sunset
Hours of daylight through the year, with sunrise and sunset times.
The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around June 16, brings about 14 hours of light; the shortest, around December 15, only 10 hours — a swing of roughly 4 hours.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 10.3 | 10.9 | 11.8 | 12.7 | 13.5 | 13.9 | 13.8 | 13.1 | 12.2 | 11.3 | 10.5 | 10.1 |
| Sunrise (AM) | 7:20 | 7:05 | 6:34 | 5:55 | 5:28 | 5:19 | 5:29 | 5:48 | 6:06 | 6:25 | 6:49 | 7:12 |
| Sunset (PM) | 5:34 | 5:59 | 6:20 | 6:40 | 6:59 | 7:16 | 7:17 | 6:55 | 6:17 | 5:40 | 5:16 | 5:15 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 10.3 | 7:20 | 5:34 |
| Feb | 10.9 | 7:05 | 5:59 |
| Mar | 11.8 | 6:34 | 6:20 |
| Apr | 12.7 | 5:55 | 6:40 |
| May | 13.5 | 5:28 | 6:59 |
| Jun | 13.9 | 5:19 | 7:16 |
| Jul | 13.8 | 5:29 | 7:17 |
| Aug | 13.1 | 5:48 | 6:55 |
| Sep | 12.2 | 6:06 | 6:17 |
| Oct | 11.3 | 6:25 | 5:40 |
| Nov | 10.5 | 6:49 | 5:16 |
| Dec | 10.1 | 7:12 | 5:15 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Khorramshahr averages about 23 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 17 and 30 days.
The sunnier stretch runs 5.2 months, from around May 20 to Oct 23. The sunniest month is July, with roughly 30 sunny days (brilliant).
The greyest month is January, down near 18 sunny days — about 42% fewer than the July peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 18 | 18 | 20 | 19 | 23 | 29 | 31 | 31 | 30 | 26 | 18 | 18 |
| Sky | Bright | Bright | Bright | Bright | Bright | Brilliant | Brilliant | Brilliant | Brilliant | Brilliant | Bright | Bright |
| Sunny days | Sky | |
|---|---|---|
| Jan | 18 | Bright |
| Feb | 18 | Bright |
| Mar | 20 | Bright |
| Apr | 19 | Bright |
| May | 23 | Bright |
| Jun | 29 | Brilliant |
| Jul | 31 | Brilliant |
| Aug | 31 | Brilliant |
| Sep | 30 | Brilliant |
| Oct | 26 | Brilliant |
| Nov | 18 | Bright |
| Dec | 18 | Bright |
Humidity comfort
Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.
Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.
In Khorramshahr, how humid it feels changes noticeably over the year.
The more humid part of the year lasts 4.8 months, from around July 15 to December 6. The muggiest month is October, when the air feels humid, muggy or worse about 22% of the time.
The most comfortable stretch runs from around December 7 to July 14, and February is the most comfortable month — the air is dry or comfortable 99% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 90 | 92 | 90 | 83 | 90 | 96 | 87 | 78 | 79 | 69 | 66 | 81 |
| Comfortable (%) | 8 | 7 | 8 | 12 | 7 | 2 | 4 | 6 | 5 | 9 | 15 | 14 |
| Humid (%) | 1 | 1 | 2 | 4 | 3 | 1 | 3 | 4 | 5 | 10 | 13 | 5 |
| Muggy (%) | 0 | 0 | 0 | 1 | 1 | 1 | 3 | 5 | 5 | 8 | 6 | 0 |
| Oppressive (%) | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 4 | 4 | 5 | 1 | 0 |
| Miserable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 2 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| Jan | 90 | 8 | 1 | 0 | 0 | 0 |
| Feb | 92 | 7 | 1 | 0 | 0 | 0 |
| Mar | 90 | 8 | 2 | 0 | 0 | 0 |
| Apr | 83 | 12 | 4 | 1 | 0 | 0 |
| May | 90 | 7 | 3 | 1 | 0 | 0 |
| Jun | 96 | 2 | 1 | 1 | 0 | 0 |
| Jul | 87 | 4 | 3 | 3 | 1 | 1 |
| Aug | 78 | 6 | 4 | 5 | 4 | 3 |
| Sep | 79 | 5 | 5 | 5 | 4 | 2 |
| Oct | 69 | 9 | 10 | 8 | 5 | 0 |
| Nov | 66 | 15 | 13 | 6 | 1 | 0 |
| Dec | 81 | 14 | 5 | 0 | 0 | 0 |
Wind
Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.
This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.
Across the year, average wind speed in Khorramshahr is typically light breeze, near 15 km/h, and varies moderately with the seasons.
The windier part of the year lasts 4.2 months, from around May 9 to Sep 14. The windiest month is June, averaging about 20 km/h (breezy).
The calmer part of the year runs from around Sep 15 to May 8, with November the calmest month at about 13 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 13 | 14 | 15 | 15 | 16 | 20 | 20 | 17 | 15 | 13 | 13 | 13 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | breezy | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 13 | light breeze |
| Feb | 14 | light breeze |
| Mar | 15 | light breeze |
| Apr | 15 | light breeze |
| May | 16 | light breeze |
| Jun | 20 | breezy |
| Jul | 20 | light breeze |
| Aug | 17 | light breeze |
| Sep | 15 | light breeze |
| Oct | 13 | light breeze |
| Nov | 13 | light breeze |
| Dec | 13 | light breeze |
Hazard calendar for Khorramshahr
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Khorramshahr sees seasonal dust haze (March–July), heaviest in May.
Best time to visit Khorramshahr
To characterize how pleasant the weather is in Khorramshahr throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around mid January, Khorramshahr is still near the start of its best-weather window — great conditions with the peak-season crowds not yet at full swing.
Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.
The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Khorramshahr for general outdoor tourist activities is from mid November to late March, with a peak score in the last week of February.
The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel score (0–10) | 7.2 | 8.1 | 7.7 | 4.0 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 2.5 | 7.4 | 7.6 |
| Rating | good | ideal | ideal | fair | poor | poor | poor | poor | poor | poor | good | ideal |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 7.2 | good |
| Feb | 8.1 | ideal |
| Mar | 7.7 | ideal |
| Apr | 4.0 | fair |
| May | 0.5 | poor |
| Jun | 0.0 | poor |
| Jul | 0.0 | poor |
| Aug | 0.0 | poor |
| Sep | 0.0 | poor |
| Oct | 2.5 | poor |
| Nov | 7.4 | good |
| Dec | 7.6 | ideal |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best times of year to visit Khorramshahr for hot-weather activities run from late February to late April and again from late October to late November, with a peak score in the last week of March.
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
What to pack for Khorramshahr, by month
Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.
For a warm-season trip around July (highs near 47°C), the essentials are light clothes and sun protection. In the cold season around January (highs near 19°C), pack a light layer.
In July, Khorramshahr sees daytime highs around 47°C and nights near 32°C. Pack light clothes and sun protection.
Sea temperature near Khorramshahr
Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.
The sea at the nearest coast (about 66 km away) is warmest in August at about 32°C and coldest in February near 16°C.
It's comfortable for a long swim from Apr 1 to Dec 9 — about 8.3 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 16 | 16 | 18 | 22 | 26 | 29 | 31 | 32 | 31 | 28 | 24 | 19 |
| Comfort | Cool | Cool | Cool | Refreshing | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Refreshing | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 16 | Cool |
| Feb | 16 | Cool |
| Mar | 18 | Cool |
| Apr | 22 | Refreshing |
| May | 26 | Warm |
| Jun | 29 | Tropical |
| Jul | 31 | Tropical |
| Aug | 32 | Tropical |
| Sep | 31 | Tropical |
| Oct | 28 | Tropical |
| Nov | 24 | Refreshing |
| Dec | 19 | Cool |
UV index (midday) in Khorramshahr by month
Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.
Under clear skies, the midday UV index in Khorramshahr peaks around June 22 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 4 | 5 | 6 | 7 | 11 | 10 | 9 | 7 | 6 | 4 | 3 |
| Level | Moderate | Moderate | Moderate | High | High | Extreme | Extreme | Very high | High | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 4 | Moderate |
| Mar | 5 | Moderate |
| Apr | 6 | High |
| May | 7 | High |
| Jun | 11 | Extreme |
| Jul | 10 | Extreme |
| Aug | 9 | Very high |
| Sep | 7 | High |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Average hourly UV index in Khorramshahr
Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.
The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
UV falls off far faster than brightness as the sun drops, so even in June the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 6 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV ≥ 3 (h/day) | 2 | 3 | 5 | 6 | 7 | 8.5 | 8 | 7.5 | 6.5 | 5.5 | 4 | 1.5 |
| UV ≥ 6 (h/day) | 0 | 0 | 0 | 0 | 3.5 | 6 | 5.5 | 4.5 | 2.5 | 0 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 2 | 0 |
| Feb | 3 | 0 |
| Mar | 5 | 0 |
| Apr | 6 | 0 |
| May | 7 | 3.5 |
| Jun | 8.5 | 6 |
| Jul | 8 | 5.5 |
| Aug | 7.5 | 4.5 |
| Sep | 6.5 | 2.5 |
| Oct | 5.5 | 0 |
| Nov | 4 | 0 |
| Dec | 1.5 | 0 |
Air quality in Khorramshahr by month
Average fine-particle pollution (PM2.5) through the year — so you can see which months the air is worst, not just the yearly average.
Air quality in Khorramshahr is worst in April — around 70 µg/m³ PM2.5 (unhealthy), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 68 | 64 | 70 | 70 | 67 | 54 | 55 | 59 | 62 | 66 | 62 | 66 |
| Level | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Poor | Poor | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 68 | Unhealthy |
| Feb | 64 | Unhealthy |
| Mar | 70 | Unhealthy |
| Apr | 70 | Unhealthy |
| May | 67 | Unhealthy |
| Jun | 54 | Poor |
| Jul | 55 | Poor |
| Aug | 59 | Unhealthy |
| Sep | 62 | Unhealthy |
| Oct | 66 | Unhealthy |
| Nov | 62 | Unhealthy |
| Dec | 66 | Unhealthy |
Growing season
Khorramshahr is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 99 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Frost nights | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 99 | 0 |
| Feb | 100 | 0 |
| Mar | 100 | 0 |
| Apr | 100 | 0 |
| May | 100 | 0 |
| Jun | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 100 | 0 |
| Oct | 100 | 0 |
| Nov | 100 | 0 |
| Dec | 100 | 0 |
Growing degree days
Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Khorramshahr banks about 6,345 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around July.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 119 | 176 | 340 | 513 | 728 | 833 | 908 | 892 | 749 | 590 | 329 | 168 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 119 |
| Feb | 176 |
| Mar | 340 |
| Apr | 513 |
| May | 728 |
| Jun | 833 |
| Jul | 908 |
| Aug | 892 |
| Sep | 749 |
| Oct | 590 |
| Nov | 329 |
| Dec | 168 |
Solar energy
Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.
Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.
Khorramshahr receives about 5.8 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 3.2 and 7.8 kWh/m².
The brighter stretch of the year lasts 6.5 months, from around Mar 19 to Oct 1. The brightest month is June, averaging about 7.8 kWh/m² (intense).
The dimmest month is December, down near 3.3 kWh/m² — roughly 58% less than the June peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 3.5 | 4.6 | 5.7 | 6.6 | 7.4 | 7.8 | 7.5 | 7.3 | 6.4 | 5.1 | 3.8 | 3.2 |
| Level | Moderate | Bright | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 3.5 | Moderate |
| Feb | 4.6 | Bright |
| Mar | 5.7 | Bright |
| Apr | 6.6 | Intense |
| May | 7.4 | Intense |
| Jun | 7.8 | Intense |
| Jul | 7.5 | Intense |
| Aug | 7.3 | Intense |
| Sep | 6.4 | Intense |
| Oct | 5.1 | Bright |
| Nov | 3.8 | Moderate |
| Dec | 3.2 | Moderate |
Where is Khorramshahr?
Khorramshahr sits at 30.4°N, 48.2°E, 4 m above sea level, in Iran. The nearest listed city is Abadan, 16 km away.
Topography around Khorramshahr
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Khorramshahr.
Within 3 km, the terrain around Khorramshahr has only modest variations in elevation — a maximum elevation change of 8 m around an average of 3 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 14 m; within 80 km, only modest variations in elevation — a maximum elevation change of 135 m.
The land around Khorramshahr is covered by artificial surfaces (49%) and bare terrain (30%) within 3 km, bare terrain (67%) within 16 km, and bare terrain (67%) within 80 km.
Iran travel facts
- Travel advisory
- Level 4
- Do Not Travel
- Power plugs
- Type C / F
- 220 V · 50 Hz
- Prices
- ≈ 352% of US
- price level, 2025
- GDP per capita
- $3,924
- 2025
- Happiness
- 5.2 / 10
- World Happiness, 2025
- Safe drinking water
- 94%
- of population, 2024
- Homicide rate
- 2.4
- per 100k, 2014
- Road deaths
- 21.5
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 492
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Khorramshahr (30.4408°, 48.1843°, elevation 4 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).