Weather in Belfast in September
The weather in Belfast in September is fickle, ranging from cold to pleasant. Temperatures are between 7 and 17 degrees and there are about 22 days of rain, so it is advised to prepare for both warm and chilly conditions.
Avg Temp
7° - 17°
Avg Rainy Days
22
Avg Dry Days
8
Avg Snow Days
0
Weather Facts - Belfast in September
* The warmest temperature recorded in in September is 25°C
* The coldest temperature recorded in Belfast in September is (-7°C)
* The average rainfall in Belfast in September is 65 mm