The climate in Darlington during September can be summarized as hot, humid and a little damp.
September is in the fall / autumn in Darlington and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 30°C (86°F), whilst at night 17°C (62°F) is normal.
| Daytime temperature | 29.8°C 85.6°F |
|---|---|
| Nightly temperature | 16.9°C 62.3°F |
| Average temperature | 23.3°C 73.9°F |
| Daily sunshine | 8.3 hrs |
| Avg rainfall | 94 mm 3.7 ins |
| Rainy days | 8 days |
| Sea temperature | 27°C 80.7°F |
| Humidity | 77% |
| Windspeed | 11.9kph 7 mph |
On average September is the 6th wettest month of the year in Darlington with around 94mm 3.7 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.3 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 Darlington in September 2025.
Best places to visit in September
| Hottest month: | July | 32.8°C 91°F |
|---|---|---|
| Driest month: | November | 66mm 2.6ins |
| Sunniest month: | April | 9.6hrs |
| Coldest month: | January | 12.7°C 54.9°F |
| Wettest month: | July | 138mm 5.4ins |