Īstgāh-e Garmsār Weather in September
What's the weather like in Īstgāh-e Garmsār (Semnān) in September 2025?
The climate in Īstgāh-e Garmsār during September can be summarized as hot and very dry.
September is in the fall / autumn in Īstgāh-e Garmsār and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a warm 33°C (91°F), whilst at night 20°C (67°F) is normal.
| Daytime temperature | 32.5°C 90.5°F |
|---|---|
| Nightly temperature | 19.5°C 67.1°F |
| Average temperature | 26°C 78.8°F |
| Daily sunshine | 10.2 hrs |
| Avg rainfall | 9 mm 0.4 ins |
| Rainy days | 2 days |
| Sea temperature | 26.8°C 80.3°F |
| Humidity | 34% |
| Windspeed | 6.1kph 4 mph |
On average September is the 4th driest month of the year in Īstgāh-e Garmsār with around 9mm 0.4 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 10.2 hours of sunshine per day.
September temperatures in Īstgāh-e Garmsār
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Īstgāh-e Garmsār in September 2025.
Other monthly averages
Best places to visit in September
Īstgāh-e Garmsār weather stats
| Hottest month: | July | 37.2°C 99°F |
|---|---|---|
| Driest month: | July | 3mm 0.1ins |
| Sunniest month: | September | 10.2hrs |
| Coldest month: | January | 8.7°C 47.7°F |
| Wettest month: | December | 40mm 1.6ins |
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