Weather in Cardiff in September
In an average September, Cardiff sees a daily high around 17°C and a low around 12°C, based on 1980–2026 of local climate records.
| Average high | 17°C |
|---|---|
| Typical high range | 15°C to 20°C |
| Average low | 12°C |
| Typical low range | 9°C to 14°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
27°C
2021-09-07
Lowest
10°C
2012-09-23
Low
Highest
19°C
2023-09-07
Lowest
4°C
2018-09-29
Feels-like
Highest
29°C
2021-09-07
Lowest
1°C
2007-09-27
Humidity
Highest
16.1 g/m³
2023-09-07
Lowest
6.2 g/m³
1987-09-27
Wind
Highest
55 km/h
1983-09-03
Lowest
5 km/h
2003-09-03
Gust
Highest
98 km/h
1983-09-03
Lowest
12 km/h
2023-09-06
Precip
Wettest
209 mm
2024
Driest
17 mm
2014
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