Weather in Belfast in September
In an average September, Belfast sees a daily high around 16°C and a low around 10°C, based on 1980–2026 of local climate records.
| Average high | 16°C |
|---|---|
| Typical high range | 13°C to 19°C |
| Average low | 10°C |
| Typical low range | 7°C to 13°C |
| Average daily precipitation | 3 mm |
September records
The most extreme September on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
25°C
2023-09-08
Lowest
10°C
2012-09-24
Low
Highest
18°C
2016-09-06
Lowest
1°C
2012-09-22
Feels-like
Highest
25°C
2023-09-08
Lowest
-4°C
1991-09-30
Humidity
Highest
15.5 g/m³
2016-09-06
Lowest
5.8 g/m³
2007-09-27
Wind
Highest
52 km/h
2018-09-19
Lowest
5 km/h
1991-09-07
Gust
Highest
110 km/h
2018-09-19
Lowest
13 km/h
2002-09-19
Precip
Wettest
143 mm
1999
Driest
6 mm
1986
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