Weather in Cardiff in September
In an average September, Cardiff sees a daily high around 17°C and a low around 10°C, based on 1980–2026 of local climate records.
| Average high | 17°C |
|---|---|
| Typical high range | 14°C to 19°C |
| Average low | 10°C |
| Typical low range | 6°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
27°C
2021-09-07
Lowest
9°C
2012-09-23
Low
Highest
18°C
2023-09-07
Lowest
1°C
2024-09-13
Feels-like
Highest
30°C
2021-09-07
Lowest
-2°C
2010-09-26
Humidity
Highest
15.5 g/m³
2023-09-07
Lowest
6.0 g/m³
2003-09-23
Wind
Highest
44 km/h
1981-09-19
Lowest
5 km/h
2003-09-03
Gust
Highest
103 km/h
1981-09-19
Lowest
12 km/h
2021-09-12
Precip
Wettest
202 mm
1981
Driest
17 mm
2014
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