Weather in Cardiff in May
In an average May, Cardiff sees a daily high around 15°C and a low around 7°C, based on 1980–2026 of local climate records.
| Average high | 15°C |
|---|---|
| Typical high range | 11°C to 19°C |
| Average low | 7°C |
| Typical low range | 3°C to 10°C |
| Average daily precipitation | 3 mm |
May records
The most extreme May on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total May accumulation.
High
Highest
29°C
2026-05-26
Lowest
6°C
1995-05-11
Low
Highest
18°C
2026-05-27
Lowest
-1°C
2020-05-12
Feels-like
Highest
32°C
2026-05-26
Lowest
-7°C
2018-05-01
Humidity
Highest
13.8 g/m³
2026-05-26
Lowest
4.3 g/m³
1984-05-13
Wind
Highest
44 km/h
2021-05-20
Lowest
5 km/h
1996-05-05
Gust
Highest
98 km/h
2021-05-20
Lowest
14 km/h
2026-05-24
Precip
Wettest
202 mm
2021
Driest
13 mm
2020
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