Climate and average weather in Jam
In Jam, the summers are muggy, sweltering, dry, and clear and the winters are mild and mostly clear.
Over the course of the year, the temperature in Jam typically varies from 14°C to 35°C, and is rarely below 11°C or above 37°C. July is the hottest month of the year, while January is the coldest.
Based on the travel score, the best time of year to visit Jam for warm-weather activities is from late October to early May.
- Hottest
- Jul
- 35°
- Coldest
- Jan
- 14°
- Wettest
- Jan
- 66 mm
- Driest
- Jun
- 0 mm
- Rain / yr
- 210 mm
- 20 wet days
- Daylight
- 10.2–13.8 h
- shortest–longest
- Elevation
- 622 m
- 27.8°N
- Clearest
- Jun
- 2% cloud
Jam is city in Bushehr Province, Iran.
- Founded
- 1996
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Jam 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 late October to early May.
Temperature through the year
Daily average highs and lows in Jam, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 5.2 months, from May 11 to October 14, with daily high temperatures above 31°C. The hottest month of the year in Jam is July, with an average high of 35°C and low of 31°C.
The cool season lasts 2.9 months, from December 11 to March 7, with daily high temperatures below 22°C. The coldest month of the year in Jam is January, with an average low of 14°C and high of 19°C.
Days typically run about 4°C warmer than nights year-round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 19 | 20 | 22 | 27 | 31 | 34 | 35 | 35 | 33 | 31 | 26 | 21 |
| Avg low (°C) | 14 | 15 | 18 | 22 | 27 | 30 | 31 | 31 | 29 | 26 | 21 | 16 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 19 | 14 |
| Feb | 20 | 15 |
| Mar | 22 | 18 |
| Apr | 27 | 22 |
| May | 31 | 27 |
| Jun | 34 | 30 |
| Jul | 35 | 31 |
| Aug | 35 | 31 |
| Sep | 33 | 29 |
| Oct | 31 | 26 |
| Nov | 26 | 21 |
| Dec | 21 | 16 |
How hot and cold Jam 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, Jam feels like about 42°C (around August 14). About 147 days a year carry some heat stress, and 62 of them tip into dangerous heat (feels-like above 39°C), peaking in August.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°C) | 19 | 20 | 22 | 27 | 31 | 36 | 40 | 42 | 38 | 32 | 25 | 21 |
| Air high (°C) | 19 | 20 | 22 | 27 | 31 | 34 | 35 | 35 | 33 | 31 | 26 | 21 |
| Feels-like low (°C) | 14 | 15 | 18 | 22 | 27 | 30 | 31 | 31 | 29 | 26 | 21 | 16 |
| Air low (°C) | 14 | 15 | 18 | 22 | 27 | 30 | 31 | 31 | 29 | 26 | 21 | 16 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | 19 | 19 | 14 | 14 |
| Feb | 20 | 20 | 15 | 15 |
| Mar | 22 | 22 | 18 | 18 |
| Apr | 27 | 27 | 22 | 22 |
| May | 31 | 31 | 27 | 27 |
| Jun | 36 | 34 | 30 | 30 |
| Jul | 40 | 35 | 31 | 31 |
| Aug | 42 | 35 | 31 | 31 |
| Sep | 38 | 33 | 29 | 29 |
| Oct | 32 | 31 | 26 | 26 |
| Nov | 25 | 26 | 21 | 21 |
| Dec | 21 | 21 | 16 | 16 |
Average hourly temperature in Jam
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 35°C, and coldest before dawn in January, near 14°C.
Jam 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° / 14° | 66 | 5.6 | 10.4 | 7.2 |
| Feb | 20° / 15° | 34 | 3.5 | 11 | 7.7 |
| Mar | 22° / 18° | 26 | 3.3 | 11.8 | 8.3 |
| Apr | 27° / 22° | 5 | 0.8 | 12.6 | 8.3 |
| May | 31° / 27° | 0 | 0.1 | 13.4 | 5.8 |
| Jun | 34° / 30° | 0 | 0 | 13.7 | 4.3 |
| Jul | 35° / 31° | 0 | 0 | 13.6 | 3.7 |
| Aug | 35° / 31° | 1 | 0.1 | 13 | 3.7 |
| Sep | 33° / 29° | 0 | 0 | 12.2 | 4.7 |
| Oct | 31° / 26° | 1 | 0.1 | 11.3 | 6.5 |
| Nov | 26° / 21° | 23 | 2.2 | 10.6 | 8.5 |
| Dec | 21° / 16° | 53 | 4.5 | 10.3 | 7.9 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Jam gets about 210 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 4.8 months, from around Nov 11 to Apr 5, peaking in January at about 20% chance on a given day. The drier stretch runs the rest of the year, bottoming out around May 20.
January is the wettest month by volume, with 66 mm over about 6 wet days; June is the driest, with 0 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 17 | 12 | 10 | 4 | 0 | 0 | 0 | 0 | 0 | 1 | 8 | 15 |
| Rain days | 6 | 4 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 5 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 17 | 6 |
| Feb | 12 | 4 |
| Mar | 10 | 3 |
| Apr | 4 | 1 |
| May | 0 | 0 |
| Jun | 0 | 0 |
| Jul | 0 | 0 |
| Aug | 0 | 0 |
| Sep | 0 | 0 |
| Oct | 1 | 0 |
| Nov | 8 | 2 |
| Dec | 15 | 5 |
Monthly rainfall
Over a full year, Jam collects about 210 mm of rain across 20 wet days — roughly 17 mm in an average month.
It doesn’t fall evenly. January is the wettest month with 66 mm, while June is the driest at just 0 mm. The three wettest months alone bring about 73% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 66 | 34 | 26 | 5 | 0 | 0 | 0 | 1 | 0 | 1 | 23 | 53 |
| Rain days | 6 | 4 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 5 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 66 | 6 |
| Feb | 34 | 4 |
| Mar | 26 | 3 |
| Apr | 5 | 1 |
| May | 0 | 0 |
| Jun | 0 | 0 |
| Jul | 0 | 0 |
| Aug | 1 | 0 |
| Sep | 0 | 0 |
| Oct | 1 | 0 |
| Nov | 23 | 2 |
| Dec | 53 | 5 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Jam, the average share of the sky covered by clouds shows moderate seasonal variation over the course of the year.
The clearer part of the year begins around May 11 and lasts for 6.0 months, ending around November 9. The clearest month is September, when the sky is clear, mostly clear, or partly cloudy 100% of the time on average.
The cloudier part of the year begins around November 10 and lasts for 6.0 months, ending around May 10. The cloudiest month is March, when it is overcast or mostly cloudy 25% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 76 | 78 | 75 | 77 | 90 | 99 | 99 | 99 | 100 | 96 | 85 | 79 |
| Cloudier (%) | 24 | 22 | 25 | 23 | 10 | 1 | 1 | 1 | 0 | 4 | 15 | 21 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 76 | 24 |
| Feb | 78 | 22 |
| Mar | 75 | 25 |
| Apr | 77 | 23 |
| May | 90 | 10 |
| Jun | 99 | 1 |
| Jul | 99 | 1 |
| Aug | 99 | 1 |
| Sep | 100 | 0 |
| Oct | 96 | 4 |
| Nov | 85 | 15 |
| Dec | 79 | 21 |
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 13 h 48 min of light; the shortest, around December 16, only 10 h 12 min — a swing of roughly 3 h 36 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 10.4 | 11.0 | 11.8 | 12.6 | 13.4 | 13.7 | 13.6 | 13.0 | 12.2 | 11.3 | 10.6 | 10.3 |
| Sunrise (AM) | 6:58 | 6:45 | 6:17 | 5:41 | 5:16 | 5:08 | 5:18 | 5:35 | 5:50 | 6:06 | 6:28 | 6:49 |
| Sunset (PM) | 5:22 | 5:46 | 6:04 | 6:21 | 6:38 | 6:53 | 6:54 | 6:35 | 6:00 | 5:25 | 5:04 | 5:04 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 10.4 | 6:58 | 5:22 |
| Feb | 11.0 | 6:45 | 5:46 |
| Mar | 11.8 | 6:17 | 6:04 |
| Apr | 12.6 | 5:41 | 6:21 |
| May | 13.4 | 5:16 | 6:38 |
| Jun | 13.7 | 5:08 | 6:53 |
| Jul | 13.6 | 5:18 | 6:54 |
| Aug | 13.0 | 5:35 | 6:35 |
| Sep | 12.2 | 5:50 | 6:00 |
| Oct | 11.3 | 6:06 | 5:25 |
| Nov | 10.6 | 6:28 | 5:04 |
| Dec | 10.3 | 6:49 | 5:04 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Jam averages about 25 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 19 and 30 days.
The sunnier stretch runs 5.8 months, from around May 12 to Nov 5. The sunniest month is September, with roughly 30 sunny days (brilliant).
The greyest month is March, down near 20 sunny days — about 36% fewer than the September peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 20 | 19 | 20 | 19 | 26 | 29 | 30 | 30 | 30 | 29 | 23 | 22 |
| Sky | Bright | Bright | Bright | Bright | Brilliant | Brilliant | Brilliant | Brilliant | Brilliant | Brilliant | Brilliant | Bright |
| Sunny days | Sky | |
|---|---|---|
| Jan | 20 | Bright |
| Feb | 19 | Bright |
| Mar | 20 | Bright |
| Apr | 19 | Bright |
| May | 26 | Brilliant |
| Jun | 29 | Brilliant |
| Jul | 30 | Brilliant |
| Aug | 30 | Brilliant |
| Sep | 30 | Brilliant |
| Oct | 29 | Brilliant |
| Nov | 23 | Brilliant |
| Dec | 22 | 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 Jam, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 5.8 months, from around May 12 to November 3. The muggiest month is July, when the air feels humid, muggy or worse about 100% of the time.
The most comfortable stretch runs from around November 4 to May 11, and January is the most comfortable month — the air is dry or comfortable 98% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 83 | 75 | 56 | 28 | 9 | 1 | 0 | 0 | 0 | 7 | 38 | 68 |
| Comfortable (%) | 15 | 23 | 33 | 44 | 38 | 13 | 0 | 0 | 3 | 15 | 32 | 25 |
| Humid (%) | 2 | 3 | 11 | 26 | 39 | 29 | 7 | 2 | 10 | 27 | 23 | 7 |
| Muggy (%) | 0 | 0 | 0 | 3 | 12 | 31 | 22 | 9 | 21 | 32 | 6 | 0 |
| Oppressive (%) | 0 | 0 | 0 | 0 | 1 | 21 | 34 | 25 | 34 | 15 | 1 | 0 |
| Miserable (%) | 0 | 0 | 0 | 0 | 0 | 5 | 36 | 64 | 32 | 4 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| Jan | 83 | 15 | 2 | 0 | 0 | 0 |
| Feb | 75 | 23 | 3 | 0 | 0 | 0 |
| Mar | 56 | 33 | 11 | 0 | 0 | 0 |
| Apr | 28 | 44 | 26 | 3 | 0 | 0 |
| May | 9 | 38 | 39 | 12 | 1 | 0 |
| Jun | 1 | 13 | 29 | 31 | 21 | 5 |
| Jul | 0 | 0 | 7 | 22 | 34 | 36 |
| Aug | 0 | 0 | 2 | 9 | 25 | 64 |
| Sep | 0 | 3 | 10 | 21 | 34 | 32 |
| Oct | 7 | 15 | 27 | 32 | 15 | 4 |
| Nov | 38 | 32 | 23 | 6 | 1 | 0 |
| Dec | 68 | 25 | 7 | 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 Jam is typically calm, near 11 km/h, and varies little with the seasons.
The windier part of the year lasts 5.8 months, from around Dec 30 to Jun 24. The windiest month is May, averaging about 12 km/h (light breeze).
The calmer part of the year runs from around Jun 25 to Dec 29, with August the calmest month at about 8 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 11 | 12 | 12 | 12 | 12 | 11 | 9 | 8 | 9 | 9 | 10 | 11 |
| Feels | calm | light breeze | light breeze | calm | light breeze | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 11 | calm |
| Feb | 12 | light breeze |
| Mar | 12 | light breeze |
| Apr | 12 | calm |
| May | 12 | light breeze |
| Jun | 11 | calm |
| Jul | 9 | calm |
| Aug | 8 | calm |
| Sep | 9 | calm |
| Oct | 9 | calm |
| Nov | 10 | calm |
| Dec | 11 | calm |
Hazard calendar for Jam
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Jam sees seasonal dust haze (March–May), heaviest in April.
Best time to visit Jam
To characterize how pleasant the weather is in Jam throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around late April, Jam is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.
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 Jam for general outdoor tourist activities is from late October to early May, with a peak score in the third week of November.
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 | 7.7 | 8.3 | 8.2 | 5.8 | 4.3 | 3.7 | 3.7 | 4.7 | 6.5 | 8.5 | 7.9 |
| Rating | good | ideal | ideal | ideal | good | fair | fair | fair | fair | good | ideal | ideal |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 7.2 | good |
| Feb | 7.7 | ideal |
| Mar | 8.3 | ideal |
| Apr | 8.2 | ideal |
| May | 5.8 | good |
| Jun | 4.3 | fair |
| Jul | 3.7 | fair |
| Aug | 3.7 | fair |
| Sep | 4.7 | fair |
| Oct | 6.5 | good |
| Nov | 8.5 | ideal |
| Dec | 7.9 | ideal |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Jam for hot-weather activities is from early April to late November, with a peak score in the last week of October.
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 Jam, 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 35°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, Jam sees daytime highs around 35°C and nights near 31°C. Pack light clothes and sun protection.
Sea temperature near Jam
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 23 km away) is warmest in August at about 34°C and coldest in February near 22°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 23 | 22 | 22 | 24 | 27 | 30 | 32 | 34 | 33 | 31 | 28 | 25 |
| Comfort | Refreshing | Refreshing | Refreshing | Refreshing | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 23 | Refreshing |
| Feb | 22 | Refreshing |
| Mar | 22 | Refreshing |
| Apr | 24 | Refreshing |
| May | 27 | Warm |
| Jun | 30 | Tropical |
| Jul | 32 | Tropical |
| Aug | 34 | Tropical |
| Sep | 33 | Tropical |
| Oct | 31 | Tropical |
| Nov | 28 | Tropical |
| Dec | 25 | Warm |
UV index (midday) in Jam 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 Jam peaks around June 18 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 4 (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) | 4 | 7 | 8 | 6 | 9 | 11 | 10 | 10 | 7 | 7 | 5 | 4 |
| Level | Moderate | Very high | Very high | High | Very high | Extreme | Extreme | Very high | High | Very high | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 7 | Very high |
| Mar | 8 | Very high |
| Apr | 6 | High |
| May | 9 | Very high |
| Jun | 11 | Extreme |
| Jul | 10 | Extreme |
| Aug | 10 | Very high |
| Sep | 7 | High |
| Oct | 7 | Very high |
| Nov | 5 | High |
| Dec | 4 | Moderate |
Average hourly UV index in Jam
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 6.5 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) | 4 | 6 | 6.5 | 6.5 | 8 | 8.5 | 8 | 7.5 | 6.5 | 6.5 | 5 | 3.5 |
| UV ≥ 6 (h/day) | 0 | 3 | 3.5 | 1.5 | 5 | 6.5 | 5.5 | 5 | 2.5 | 3 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 4 | 0 |
| Feb | 6 | 3 |
| Mar | 6.5 | 3.5 |
| Apr | 6.5 | 1.5 |
| May | 8 | 5 |
| Jun | 8.5 | 6.5 |
| Jul | 8 | 5.5 |
| Aug | 7.5 | 5 |
| Sep | 6.5 | 2.5 |
| Oct | 6.5 | 3 |
| Nov | 5 | 0 |
| Dec | 3.5 | 0 |
Air quality in Jam 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 Jam is worst in July — around 56 µg/m³ PM2.5 (unhealthy), about 2.1× the cleanest month (November, 26 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 30 | 32 | 37 | 41 | 45 | 42 | 56 | 46 | 39 | 34 | 26 | 27 |
| Level | Moderate | Moderate | Poor | Poor | Poor | Poor | Unhealthy | Poor | Poor | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 30 | Moderate |
| Feb | 32 | Moderate |
| Mar | 37 | Poor |
| Apr | 41 | Poor |
| May | 45 | Poor |
| Jun | 42 | Poor |
| Jul | 56 | Unhealthy |
| Aug | 46 | Poor |
| Sep | 39 | Poor |
| Oct | 34 | Moderate |
| Nov | 26 | Moderate |
| Dec | 27 | Moderate |
Growing season
Jam 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 (%) | 100 | 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 | 100 | 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. Jam banks about 5,666 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around August.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 196 | 204 | 312 | 430 | 594 | 652 | 707 | 709 | 637 | 563 | 392 | 270 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 196 |
| Feb | 204 |
| Mar | 312 |
| Apr | 430 |
| May | 594 |
| Jun | 652 |
| Jul | 707 |
| Aug | 709 |
| Sep | 637 |
| Oct | 563 |
| Nov | 392 |
| Dec | 270 |
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.
Jam receives about 5.9 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 3.7 and 7.8 kWh/m².
The brighter stretch of the year lasts 6.4 months, from around Mar 21 to Oct 1. The brightest month is May, averaging about 7.6 kWh/m² (intense).
The dimmest month is December, down near 3.7 kWh/m² — roughly 52% less than the May peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 3.8 | 4.8 | 5.8 | 6.8 | 7.6 | 7.7 | 7.3 | 7.0 | 6.3 | 5.4 | 4.3 | 3.7 |
| Level | Moderate | Bright | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 3.8 | Moderate |
| Feb | 4.8 | Bright |
| Mar | 5.8 | Bright |
| Apr | 6.8 | Intense |
| May | 7.6 | Intense |
| Jun | 7.7 | Intense |
| Jul | 7.3 | Intense |
| Aug | 7.0 | Intense |
| Sep | 6.3 | Intense |
| Oct | 5.4 | Bright |
| Nov | 4.3 | Bright |
| Dec | 3.7 | Moderate |
Where is Jam?
Jam sits at 27.8°N, 52.3°E, 622 m above sea level, in Iran. The nearest listed city is Makū, 10 km away.
Topography around Jam
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Jam.
Within 3 km, the terrain around Jam has only modest variations in elevation — a maximum elevation change of 166 m around an average of 652 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,518 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,093 m.
The land around Jam is covered by bare terrain (44%) and artificial surfaces (32%) within 3 km, bare terrain (79%) within 16 km, and bare terrain (64%) and water (25%) 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 Jam (27.8298°, 52.3252°, elevation 622 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).