Weather in Belfast, Northern Ireland, United Kingdom in September
In an average September, Belfast sees a daily high around 15°C and a low around 11°C, based on 1981–2026 of local climate records.
| Average high | 15°C |
|---|---|
| Typical high range | 13°C to 17°C |
| Average low | 11°C |
| Typical low range | 9°C to 13°C |
| Average daily precipitation | 3 mm |
September records
The most extreme September on record for each metric, across 1981–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
22°C
2023-09-08
Lowest
10°C
2013-09-17
Low
Highest
16°C
2016-09-06
Lowest
6°C
1988-09-30
Feels-like
Highest
22°C
2023-09-08
Lowest
1°C
1983-09-22
Humidity
Highest
14.9 g/m³
2023-09-08
Lowest
6.6 g/m³
2007-09-27
Wind
Highest
76 km/h
2018-09-19
Lowest
6 km/h
1991-09-09
Precip
Wettest
169 mm
1981
Driest
10 mm
2014
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