Climate and average weather in Deir ez-Zor
In Deir ez-Zor, the summers are sweltering, dry, and clear and the winters are cool and mostly clear.
Over the course of the year, the temperature in Deir ez-Zor typically varies from 4°C to 41°C, and is rarely below -0°C or above 45°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 Deir ez-Zor for warm-weather activities are from late February to late April and late October to late November.
- Hottest
- Jul
- 41°
- Coldest
- Jan
- 4°
- Wettest
- Jan
- 25 mm
- Driest
- Jul
- 0 mm
- Rain / yr
- 142 mm
- 30 wet days
- Daylight
- 9.6–14.4 h
- shortest–longest
- Elevation
- 210 m
- 35.3°N
- Clearest
- Aug
- 1% cloud
Deir ez-Zor is city in eastern Syria.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Deir ez-Zor 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 February to late April.
Temperature through the year
Daily average highs and lows in Deir ez-Zor, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 4.3 months, from May 21 to September 28, with daily high temperatures above 34°C. The hottest month of the year in Deir ez-Zor is July, with an average high of 41°C and low of 27°C.
The cool season lasts 3.1 months, from November 25 to February 27, with daily high temperatures below 18°C. The coldest month of the year in Deir ez-Zor is January, with an average low of 4°C and high of 13°C.
Days typically run about 12°C warmer than nights, with the widest day–night swing (around 14°C) in July.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 13 | 16 | 21 | 27 | 33 | 38 | 41 | 40 | 36 | 30 | 21 | 14 |
| Avg low (°C) | 4 | 6 | 10 | 14 | 20 | 25 | 27 | 27 | 23 | 18 | 10 | 6 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 13 | 4 |
| Feb | 16 | 6 |
| Mar | 21 | 10 |
| Apr | 27 | 14 |
| May | 33 | 20 |
| Jun | 38 | 25 |
| Jul | 41 | 27 |
| Aug | 40 | 27 |
| Sep | 36 | 23 |
| Oct | 30 | 18 |
| Nov | 21 | 10 |
| Dec | 14 | 6 |
How hot and cold Deir ez-Zor 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, Deir ez-Zor feels like about 41°C (around July 24). About 151 days a year carry some heat stress, and 70 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) | 13 | 16 | 21 | 27 | 33 | 38 | 41 | 40 | 36 | 30 | 21 | 14 |
| Air high (°C) | 13 | 16 | 21 | 27 | 33 | 38 | 41 | 40 | 36 | 30 | 21 | 14 |
| Feels-like low (°C) | 2 | 3 | 9 | 14 | 20 | 25 | 27 | 27 | 23 | 18 | 9 | 3 |
| Air low (°C) | 4 | 6 | 10 | 14 | 20 | 25 | 27 | 27 | 23 | 18 | 10 | 6 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | 13 | 13 | 2 | 4 |
| Feb | 16 | 16 | 3 | 6 |
| Mar | 21 | 21 | 9 | 10 |
| Apr | 27 | 27 | 14 | 14 |
| May | 33 | 33 | 20 | 20 |
| Jun | 38 | 38 | 25 | 25 |
| Jul | 41 | 41 | 27 | 27 |
| Aug | 40 | 40 | 27 | 27 |
| Sep | 36 | 36 | 23 | 23 |
| Oct | 30 | 30 | 18 | 18 |
| Nov | 21 | 21 | 9 | 10 |
| Dec | 14 | 14 | 3 | 6 |
Average hourly temperature in Deir ez-Zor
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 41°C, and coldest before dawn in January, near 4°C.
Deir ez-Zor 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 | 13° / 4° | 25 | 5.6 | 9.9 | 4.1 |
| Feb | 16° / 6° | 22 | 4.8 | 10.7 | 5.6 |
| Mar | 21° / 10° | 21 | 4.5 | 11.7 | 7.6 |
| Apr | 27° / 14° | 12 | 2.8 | 12.9 | 7.9 |
| May | 33° / 20° | 8 | 1.6 | 13.8 | 4.6 |
| Jun | 38° / 25° | 0 | 0.1 | 14.3 | 1.4 |
| Jul | 41° / 27° | 0 | 0 | 14.1 | 0.0 |
| Aug | 40° / 27° | 0 | 0.1 | 13.3 | 0.1 |
| Sep | 36° / 23° | 0 | 0.1 | 12.2 | 2.5 |
| Oct | 30° / 18° | 10 | 1.7 | 11.1 | 6.4 |
| Nov | 21° / 10° | 19 | 3.5 | 10.1 | 7.8 |
| Dec | 14° / 6° | 24 | 4.9 | 9.7 | 5.0 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Deir ez-Zor gets about 142 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 6.4 months, from around Oct 25 to May 7, peaking in February at about 19% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jun 17.
January is the wettest month by volume, with 25 mm over about 6 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 (%) | 18 | 17 | 15 | 9 | 5 | 0 | 0 | 0 | 0 | 5 | 12 | 16 |
| Rain days | 6 | 5 | 5 | 3 | 2 | 0 | 0 | 0 | 0 | 2 | 4 | 5 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 18 | 6 |
| Feb | 17 | 5 |
| Mar | 15 | 5 |
| Apr | 9 | 3 |
| May | 5 | 2 |
| Jun | 0 | 0 |
| Jul | 0 | 0 |
| Aug | 0 | 0 |
| Sep | 0 | 0 |
| Oct | 5 | 2 |
| Nov | 12 | 4 |
| Dec | 16 | 5 |
Monthly rainfall
Over a full year, Deir ez-Zor collects about 142 mm of rain across 30 wet days — roughly 12 mm in an average month.
It doesn’t fall evenly. January is the wettest month with 25 mm, while July is the driest at just 0 mm. The three wettest months alone bring about 50% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 25 | 22 | 21 | 12 | 8 | 0 | 0 | 0 | 0 | 10 | 19 | 24 |
| Rain days | 6 | 5 | 5 | 3 | 2 | 0 | 0 | 0 | 0 | 2 | 4 | 5 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 25 | 6 |
| Feb | 22 | 5 |
| Mar | 21 | 5 |
| Apr | 12 | 3 |
| May | 8 | 2 |
| Jun | 0 | 0 |
| Jul | 0 | 0 |
| Aug | 0 | 0 |
| Sep | 0 | 0 |
| Oct | 10 | 2 |
| Nov | 19 | 4 |
| Dec | 24 | 5 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Deir ez-Zor, 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 10 and lasts for 5.5 months, ending around October 23. 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 24 and lasts for 6.5 months, ending around May 9. The cloudiest month is December, when it is overcast or mostly cloudy 36% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 65 | 69 | 72 | 74 | 86 | 99 | 100 | 100 | 99 | 86 | 73 | 64 |
| Cloudier (%) | 35 | 31 | 28 | 26 | 14 | 1 | 0 | 0 | 1 | 14 | 27 | 36 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 65 | 35 |
| Feb | 69 | 31 |
| Mar | 72 | 28 |
| Apr | 74 | 26 |
| May | 86 | 14 |
| Jun | 99 | 1 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 99 | 1 |
| Oct | 86 | 14 |
| Nov | 73 | 27 |
| Dec | 64 | 36 |
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 13, brings about 14 h 24 min of light; the shortest, around December 13, only 9 h 36 min — a swing of roughly 4 h 48 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 9.9 | 10.7 | 11.7 | 12.9 | 13.8 | 14.3 | 14.1 | 13.3 | 12.2 | 11.1 | 10.1 | 9.7 |
| Sunrise (AM) | 6:33 | 6:14 | 5:37 | 4:53 | 4:20 | 4:09 | 4:20 | 4:43 | 5:07 | 5:32 | 6:01 | 6:27 |
| Sunset (PM) | 4:25 | 4:54 | 5:21 | 5:46 | 6:11 | 6:31 | 6:30 | 6:04 | 5:20 | 4:37 | 4:08 | 4:04 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 9.9 | 6:33 | 4:25 |
| Feb | 10.7 | 6:14 | 4:54 |
| Mar | 11.7 | 5:37 | 5:21 |
| Apr | 12.9 | 4:53 | 5:46 |
| May | 13.8 | 4:20 | 6:11 |
| Jun | 14.3 | 4:09 | 6:31 |
| Jul | 14.1 | 4:20 | 6:30 |
| Aug | 13.3 | 4:43 | 6:04 |
| Sep | 12.2 | 5:07 | 5:20 |
| Oct | 11.1 | 5:32 | 4:37 |
| Nov | 10.1 | 6:01 | 4:08 |
| Dec | 9.7 | 6:27 | 4:04 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Deir ez-Zor averages about 22 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 15 and 30 days.
The sunnier stretch runs 5.3 months, from around May 13 to Oct 20. The sunniest month is June, with roughly 29 sunny days (brilliant).
The greyest month is January, down near 15 sunny days — about 49% fewer than the June peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 15 | 15 | 17 | 18 | 23 | 29 | 31 | 31 | 29 | 24 | 18 | 15 |
| Sky | Bright | Bright | Bright | Bright | Bright | Brilliant | Brilliant | Brilliant | Brilliant | Brilliant | Bright | Bright |
| Sunny days | Sky | |
|---|---|---|
| Jan | 15 | Bright |
| Feb | 15 | Bright |
| Mar | 17 | Bright |
| Apr | 18 | Bright |
| May | 23 | Bright |
| Jun | 29 | Brilliant |
| Jul | 31 | Brilliant |
| Aug | 31 | Brilliant |
| Sep | 29 | Brilliant |
| Oct | 24 | Brilliant |
| Nov | 18 | Bright |
| Dec | 15 | 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 Deir ez-Zor, the air stays dry or comfortable essentially all year. Even in August, the muggiest month, it feels humid or worse only about 8% of the time — humidity is not something you need to plan around here.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 99 | 98 | 95 | 92 | 66 | 56 | 79 | 88 | 93 | 100 |
| Comfortable (%) | 0 | 0 | 1 | 2 | 4 | 7 | 28 | 36 | 20 | 10 | 7 | 0 |
| Humid (%) | 0 | 0 | 0 | 0 | 1 | 0 | 6 | 8 | 1 | 1 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| Jan | 100 | 0 | 0 |
| Feb | 100 | 0 | 0 |
| Mar | 99 | 1 | 0 |
| Apr | 98 | 2 | 0 |
| May | 95 | 4 | 1 |
| Jun | 92 | 7 | 0 |
| Jul | 66 | 28 | 6 |
| Aug | 56 | 36 | 8 |
| Sep | 79 | 20 | 1 |
| Oct | 88 | 10 | 1 |
| Nov | 93 | 7 | 0 |
| Dec | 100 | 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 Deir ez-Zor is typically light breeze, near 14 km/h, and varies a lot with the seasons.
The windier part of the year lasts 5.2 months, from around Apr 12 to Sep 15. The windiest month is July, averaging about 22 km/h (breezy).
The calmer part of the year runs from around Sep 16 to Apr 11, with November the calmest month at about 9 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 11 | 12 | 13 | 14 | 16 | 20 | 22 | 19 | 14 | 10 | 9 | 10 |
| Feels | calm | calm | light breeze | light breeze | light breeze | breezy | breezy | light breeze | light breeze | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 11 | calm |
| Feb | 12 | calm |
| Mar | 13 | light breeze |
| Apr | 14 | light breeze |
| May | 16 | light breeze |
| Jun | 20 | breezy |
| Jul | 22 | breezy |
| Aug | 19 | light breeze |
| Sep | 14 | light breeze |
| Oct | 10 | calm |
| Nov | 9 | calm |
| Dec | 10 | calm |
Hazard calendar for Deir ez-Zor
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Deir ez-Zor sees seasonal dust haze (April–June), heaviest in May.
Best time to visit Deir ez-Zor
To characterize how pleasant the weather is in Deir ez-Zor throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around early March, Deir ez-Zor 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 times of year to visit Deir ez-Zor for general outdoor tourist activities run from late February to late April and again from late October to late November, with a peak score in the first 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) | 4.1 | 5.6 | 7.6 | 7.8 | 4.6 | 1.4 | 0.0 | 0.1 | 2.5 | 6.4 | 7.7 | 5.0 |
| Rating | fair | good | ideal | ideal | fair | poor | poor | poor | poor | good | ideal | fair |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 4.1 | fair |
| Feb | 5.6 | good |
| Mar | 7.6 | ideal |
| Apr | 7.8 | ideal |
| May | 4.6 | fair |
| Jun | 1.4 | poor |
| Jul | 0.0 | poor |
| Aug | 0.1 | poor |
| Sep | 2.5 | poor |
| Oct | 6.4 | good |
| Nov | 7.7 | ideal |
| Dec | 5.0 | fair |
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 Deir ez-Zor for hot-weather activities run from early April to late May and again from late September to early November, with a peak score in the third 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 Deir ez-Zor, 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 41°C), the essentials are light clothes, sun protection and a windbreaker. In the cold season around January (highs near 13°C), pack a warm layer.
In July, Deir ez-Zor sees daytime highs around 41°C and nights near 27°C. Pack light clothes and sun protection. Worth having: a windbreaker.
UV index (midday) in Deir ez-Zor 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 Deir ez-Zor peaks around June 14 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 13 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 4 | 5 | 6 | 7 | 10 | 6 | 9 | 5 | 5 | 4 | 3 |
| Level | Moderate | Moderate | Moderate | High | Very high | Very high | High | Very high | Moderate | Moderate | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 4 | Moderate |
| Mar | 5 | Moderate |
| Apr | 6 | High |
| May | 7 | Very high |
| Jun | 10 | Very high |
| Jul | 6 | High |
| Aug | 9 | Very high |
| Sep | 5 | Moderate |
| Oct | 5 | Moderate |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Average hourly UV index in Deir ez-Zor
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 5.5 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) | 0 | 2.5 | 4.5 | 6.5 | 7.5 | 8.5 | 7 | 7.5 | 5 | 4.5 | 2.5 | 0 |
| UV ≥ 6 (h/day) | 0 | 0 | 0 | 1.5 | 4 | 5.5 | 2.5 | 4.5 | 0 | 0 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 0 | 0 |
| Feb | 2.5 | 0 |
| Mar | 4.5 | 0 |
| Apr | 6.5 | 1.5 |
| May | 7.5 | 4 |
| Jun | 8.5 | 5.5 |
| Jul | 7 | 2.5 |
| Aug | 7.5 | 4.5 |
| Sep | 5 | 0 |
| Oct | 4.5 | 0 |
| Nov | 2.5 | 0 |
| Dec | 0 | 0 |
Air quality in Deir ez-Zor 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 Deir ez-Zor is worst in July — around 55 µg/m³ PM2.5 (unhealthy), about 1.9× the cleanest month (November, 29 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) | 32 | 35 | 44 | 43 | 48 | 49 | 55 | 52 | 42 | 37 | 29 | 31 |
| Level | Moderate | Moderate | Poor | Poor | Poor | Poor | Unhealthy | Poor | Poor | Poor | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 32 | Moderate |
| Feb | 35 | Moderate |
| Mar | 44 | Poor |
| Apr | 43 | Poor |
| May | 48 | Poor |
| Jun | 49 | Poor |
| Jul | 55 | Unhealthy |
| Aug | 52 | Poor |
| Sep | 42 | Poor |
| Oct | 37 | Poor |
| Nov | 29 | Moderate |
| Dec | 31 | Moderate |
Growing season
Deir ez-Zor is mild enough that a frost-free day stays more likely than not even in midwinter.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 91 | 96 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 95 |
| Frost nights | 26 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 91 | 26 |
| Feb | 96 | 7 |
| 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 | 95 | 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. Deir ez-Zor banks about 4,329 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) | 0 | 27 | 163 | 316 | 506 | 638 | 739 | 733 | 598 | 431 | 165 | 13 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 0 |
| Feb | 27 |
| Mar | 163 |
| Apr | 316 |
| May | 506 |
| Jun | 638 |
| Jul | 739 |
| Aug | 733 |
| Sep | 598 |
| Oct | 431 |
| Nov | 165 |
| Dec | 13 |
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.
Deir ez-Zor receives about 5.5 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 2.6 and 8.1 kWh/m².
The brighter stretch of the year lasts 6.2 months, from around Mar 22 to Sep 27. The brightest month is June, averaging about 8.0 kWh/m² (intense).
The dimmest month is December, down near 2.6 kWh/m² — roughly 67% less than the June peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 2.9 | 4.0 | 5.3 | 6.6 | 7.5 | 8.1 | 8.0 | 7.4 | 6.1 | 4.5 | 3.3 | 2.6 |
| Level | Moderate | Moderate | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 2.9 | Moderate |
| Feb | 4.0 | Moderate |
| Mar | 5.3 | Bright |
| Apr | 6.6 | Intense |
| May | 7.5 | Intense |
| Jun | 8.1 | Intense |
| Jul | 8.0 | Intense |
| Aug | 7.4 | Intense |
| Sep | 6.1 | Intense |
| Oct | 4.5 | Bright |
| Nov | 3.3 | Moderate |
| Dec | 2.6 | Moderate |
Where is Deir ez-Zor?
Deir ez-Zor sits at 35.3°N, 40.1°E, 210 m above sea level, in Syria. The nearest listed city is Al Mayādīn, 45 km away.
Topography around Deir ez-Zor
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Deir ez-Zor.
Within 3 km, the terrain around Deir ez-Zor has only modest variations in elevation — a maximum elevation change of 65 m around an average of 215 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 137 m; within 80 km, large variations in elevation — a maximum elevation change of 684 m.
The land around Deir ez-Zor is covered by artificial surfaces (45%) and bare terrain (23%) within 3 km, bare terrain (56%) within 16 km, and bare terrain (82%) within 80 km.
Syria travel facts
- Travel advisory
- Level 4
- Do Not Travel
- Power plugs
- Type C / E / L
- 220 V · 50 Hz
- Prices
- ≈ 32% of US
- price level, 2022
- GDP per capita
- $1,057
- 2022
- Happiness
- 3.5 / 10
- World Happiness, 2018
- Homicide rate
- 2.1
- per 100k, 2010
- Road deaths
- 14.9
- per 100k/yr, 2019
- Income group
- Low
- World Bank
- English
- Low
- EF EPI 456
- 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 Deir ez-Zor (35.3359°, 40.1408°, elevation 210 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. 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).