Climate guideThirty-year normals for Tehran
Tehran climate by month
Hot, dry-summer continental · DsaBest Apr–May · Oct
Annual mean15°day and night
Seasonal swing30°warmest vs coolest
Precipitation397 mm91 wet days a year
35.69° N, 51.42° EElevation 1,178 mUTC+3:30 · Iran Standard Time
When to goTehran · weather score
Best timeApr–May · Oct
October: high / low23° / 13°
iSummary
What the weather is like
Tehran has a hot, dry-summer continental climate (Köppen Dsa): dry summers and cold winters.
The warmest month is July, when afternoons average 35° and nights 24°. January is the coolest month, with highs of 5° and lows of -5°. The difference between the warmest and the coolest month is about 30°, a large swing typical of continental interiors.
About 397 mm of precipitation falls in an average year. November is the wettest month (40 mm, 11 wet days) and June the driest (5 mm, 3 wet days). Cloud cover ranges from 3% in August to 26% in March.
Year in figures
- Hottest afternoons
- 35° · July
- Coldest nights
- -5° · January
- Wettest month
- November
- Driest month
- June
- Clearest skies
- August · 3% cloud
- Longest day
- 14 h 34 min
- Shortest day
- 9 h 46 min
iiCharts
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columnsTemperature curve
Average high, lowDaylight
Hours between sunrise and sunset on the 15th of each monthiiiData table
Climate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 5° | 7° | 12° | 20° | 26° | 33° | 35° | 34° | 30° | 23° | 15° | 8° |
| Average low | -5° | -4° | 1° | 8° | 14° | 21° | 24° | 24° | 19° | 13° | 5° | -2° |
| Precipitation | 54 mm | 56 mm | 72 mm | 56 mm | 28 mm | 5 mm | 5 mm | 3 mm | 3 mm | 21 mm | 40 mm | 54 mm |
| Wet days (≥1 mm) | 9.8 | 9.3 | 9.3 | 8.4 | 4.5 | 3 | 3.9 | 4.3 | 7.2 | 9.4 | 11.4 | 10.2 |
| Cloud cover | 25% | 25% | 26% | 26% | 20% | 7% | 5% | 3% | 3% | 14% | 21% | 25% |
| Daylight | 10h 00 | 10h 54 | 11h 55 | 13h 05 | 14h 02 | 14h 34 | 14h 21 | 13h 32 | 12h 26 | 11h 20 | 10h 18 | 9h 46 |
| Month score | 35 | 36 | 48 | 80 | 84 | 61 | 49 | 51 | 63 | 78 | 55 | 34 |
ivMonth by month
Tehran in every month
January35
5° / -5°
54 mm · 9.8 wet days
February36
7° / -4°
56 mm · 9.3 wet days
March48
12° / 1°
72 mm · 9.3 wet days
April80
20° / 8°
56 mm · 8.4 wet days
May84
26° / 14°
28 mm · 4.5 wet days
June61
33° / 21°
5 mm · 3 wet days
July49
35° / 24°
5 mm · 3.9 wet days
August51
34° / 24°
3 mm · 4.3 wet days
September63
30° / 19°
3 mm · 7.2 wet days
October78
23° / 13°
21 mm · 9.4 wet days
November55
15° / 5°
40 mm · 11.4 wet days
December34
8° / -2°
54 mm · 10.2 wet days