Climate averages 1991–2020
Tehran weather
in August.
A very hot, very dry month: the 2nd warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a very hot month in Tehran: daytime highs average 34.6°C and nights cool to about 23.4°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 4.2 mm of rain on fewer than one day, which makes August a very dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 30 min on an average August day.
The nearest other city in this atlas is Tajrīsh (12 km away). In August its highs average 31.3°C, 3.3°C cooler than Tehran, with 4.2 mm of rain.
Among the 128 cities listed in Iran, Tehran ranks joint 65th of 128 for the warmest August highs and joint 105th of 128 for the driest August (rainfall, lowest first). The mean August high of those 128 cities is 35.2°C; Tehran is 0.6°C cooler than that mean.
From August to September, average highs fall by 4.7°C to 29.9°C, and monthly rainfall rises from 4.2 mm to 4.7 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Tehran climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.3°C-5.3°C | -5.3°C | 42 | 7.6 | 10.010 h |
| February | 7.4°C-3.5°C | -3.5°C | 49 | 8.5 | 10.911 h |
| March | 13.3°C1.6°C | 1.6°C | 62 | 9.5 | 11.912 h |
| April | 20.0°C8.0°C | 8.0°C | 51 | 9.5 | 13.113 h |
| May | 26.6°C14.0°C | 14.0°C | 22 | 5.0 | 14.014 h |
| June | 32.9°C20.4°C | 20.4°C | 5.8 | 1.6 | 14.515 h |
| July | 35.6°C24.5°C | 24.5°C | 4.6 | 1.2 | 14.314 h |
| August, selected | 34.6°C23.4°C | 23.4°C | 4.2 | 0.8 | 13.514 h |
| September | 29.9°C18.6°C | 18.6°C | 4.7 | 0.9 | 12.412 h |
| October | 22.6°C12.0°C | 12.0°C | 21 | 4.1 | 11.311 h |
| November | 13.4°C3.8°C | 3.8°C | 45 | 7.1 | 10.310 h |
| December | 7.6°C-2.2°C | -2.2°C | 43 | 7.5 | 9.810 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Tajrīsh in AugustIran · 12 kmHigh 31.3°C · Low 22.2°C · 4.2 mm rain
- Eslamshahr in AugustIran · 23 kmHigh 36.1°C · Low 22.1°C · 1.4 mm rain
- Bāghestān in AugustIran · 27 kmHigh 35.8°C · Low 21.2°C · 2.5 mm rain
- Golestān in AugustIran · 29 kmHigh 36.3°C · Low 22.2°C · 1.4 mm rain
- Qarchak in AugustIran · 33 kmHigh 36.9°C · Low 23.2°C · 1.3 mm rain
- Shahrīār in AugustIran · 33 kmHigh 35.0°C · Low 21.0°C · 1.7 mm rain
- Pākdasht in AugustIran · 34 kmHigh 36.0°C · Low 23.4°C · 1.6 mm rain
- Pardīs in AugustIran · 36 kmHigh 29.3°C · Low 19.6°C · 5.0 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Tehran) is explained once on the Tehran year overview and on the Sources, method and limits page.
Tajrīsh lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.