Climate averages 1991–2020
Semnan weather
in July.
A very hot, very dry month: the warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a very hot month in Semnan: daytime highs average 35.3°C and nights cool to about 22.4°C. By daytime temperature it is the warmest month of the year.
Expect about 1.0 mm of rain on fewer than one day, which makes July a very dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 14 h 19 min on an average July day.
The nearest other city in this atlas is Qā’em Shahr (110 km away). In July its highs average 29.7°C, 5.5°C cooler than Semnan, with 53 mm of rain.
Among the 128 cities listed in Iran, Semnan ranks joint 61st of 128 for the warmest July highs and joint 56th of 128 for the driest July (rainfall, lowest first). The mean July high of those 128 cities is 35.7°C; Semnan is 0.4°C cooler than that mean.
From July to August, average highs fall by 1.0°C to 34.3°C, and monthly rainfall rises from 1.0 mm to 1.2 mm.
The annual picture
July 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
Semnan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.1°C-1.0°C | -1.0°C | 12 | 3.3 | 10.010 h |
| February | 9.6°C0.4°C | 0.4°C | 14 | 3.1 | 10.911 h |
| March | 15.3°C4.7°C | 4.7°C | 18 | 3.9 | 11.912 h |
| April | 21.9°C10.4°C | 10.4°C | 13 | 2.8 | 13.113 h |
| May | 27.7°C15.2°C | 15.2°C | 4.8 | 1.3 | 14.014 h |
| June | 32.8°C19.5°C | 19.5°C | 1.2 | 0.3 | 14.515 h |
| July, selected | 35.3°C22.4°C | 22.4°C | 1.0 | 0.3 | 14.314 h |
| August | 34.3°C21.7°C | 21.7°C | 1.2 | 0.3 | 13.514 h |
| September | 29.8°C18.0°C | 18.0°C | 1.7 | 0.5 | 12.412 h |
| October | 22.8°C12.5°C | 12.5°C | 4.5 | 1.2 | 11.311 h |
| November | 13.9°C5.8°C | 5.8°C | 11 | 3.1 | 10.310 h |
| December | 8.4°C1.2°C | 1.2°C | 10 | 3.2 | 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
July in nearby cities
- Qā’em Shahr in JulyIran · 110 kmHigh 29.7°C · Low 21.3°C · 53 mm rain
- Sari in JulyIran · 114 kmHigh 30.9°C · Low 21.6°C · 56 mm rain
- Behshahr in JulyIran · 125 kmHigh 31.2°C · Low 23.5°C · 25 mm rain
- Bābol in JulyIran · 126 kmHigh 29.8°C · Low 22.3°C · 53 mm rain
- Āmol in JulyIran · 136 kmHigh 26.6°C · Low 21.1°C · 77 mm rain
- Būmahen in JulyIran · 139 kmHigh 31.4°C · Low 21.5°C · 5.2 mm rain
- Pardīs in JulyIran · 144 kmHigh 30.4°C · Low 20.5°C · 5.2 mm rain
- Pākdasht in JulyIran · 155 kmHigh 37.2°C · Low 24.9°C · 1.2 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 Semnan) is explained once on the Semnan year overview and on the Sources, method and limits page.