The climate in Mussoorie during September can be summarized as warm, humid and wet.
September is in the fall / autumn in Mussoorie and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a muggy 26°C (78°F), whilst at night 18°C (64°F) is normal.
| Daytime temperature | 25.7°C 78.2°F |
|---|---|
| Nightly temperature | 17.6°C 63.6°F |
| Average temperature | 21.6°C 70.9°F |
| Daily sunshine | 7.7 hrs |
| Avg rainfall | 190 mm 7.5 ins |
| Rainy days | 9 days |
| Sea temperature | 23.9°C 75°F |
| Humidity | 74% |
| Windspeed | 7.9kph 5 mph |
On average September is the 3rd wettest month of the year in Mussoorie with around 190mm 7.5 inches of rain making it a wet time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.7 hours of sunshine per day.
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 Mussoorie in September 2025.
Best places to visit in September
| Hottest month: | June | 29.5°C 85.1°F |
|---|---|---|
| Driest month: | November | 14mm 0.6ins |
| Sunniest month: | October | 9hrs |
| Coldest month: | January | 14.4°C 57.9°F |
| Wettest month: | July | 403mm 15.9ins |