Weather in Swansea in September
In an average September, Swansea sees a daily high around 17°C and a low around 13°C, based on 1980–2026 of local climate records.
| Average high | 17°C |
|---|---|
| Typical high range | 15°C to 19°C |
| Average low | 13°C |
| Typical low range | 11°C to 15°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
24°C
2021-09-07
Lowest
12°C
2020-09-24
Low
Highest
20°C
2023-09-07
Lowest
7°C
2007-09-27
Feels-like
Highest
24°C
2021-09-07
Lowest
3°C
2007-09-27
Humidity
Highest
16.0 g/m³
2023-09-07
Lowest
6.4 g/m³
2007-09-27
Wind
Highest
70 km/h
1983-09-03
Lowest
7 km/h
2003-09-16
Gust
Highest
107 km/h
1983-09-03
Lowest
13 km/h
2003-09-16
Precip
Wettest
235 mm
1981
Driest
19 mm
2014
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