Weather in Swansea, Wales, United Kingdom in September
In an average September, Swansea sees a daily high around 17°C and a low around 12°C, based on 1981–2026 of local climate records.
| Average high | 17°C |
|---|---|
| Typical high range | 15°C to 20°C |
| Average low | 12°C |
| Typical low range | 10°C to 15°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
25°C
2023-09-09
Lowest
11°C
2012-09-23
Low
Highest
18°C
2023-09-08
Lowest
6°C
1986-09-17
Feels-like
Highest
25°C
2023-09-09
Lowest
3°C
1986-09-17
Humidity
Highest
15.9 g/m³
2023-09-08
Lowest
7.1 g/m³
2003-09-24
Wind
Highest
67 km/h
1983-09-03
Lowest
8 km/h
1985-09-09
Precip
Wettest
161 mm
1981
Driest
20 mm
2014
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