Is Cardiff hot in May?
Days are typically cool at 17.3°C, while nights average 7.4°C.
United Kingdom · 1991–2020 normal
Cardiff in
May.
Typical May weather in Cardiff: 17.3°C by day, 7.4°C at night, 47 mm of rain over 9.2 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high17.3°C
Typical low7.4°C
Rain47 mm
Wet days9.2
In the year-round weather comparison, May scores 57 out of 100 (July leads the year at 81). Daylight is calculated as 15 h 34 from latitude 51.48°. Open-water sea temperature is 12.0°C (12 km from the place centre).
May at a glance
What is Cardiff like in May?
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Does it rain much?
The measured monthly average is 47 mm across about 9 wet days.
How much daylight is there?
There are about 15 h 34 between sunrise and sunset at mid-month, calculated from the place latitude.
Is May a good time to visit?
May ranks 5 of 12 in our weather comparison; July ranks first.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 2653822
- NOAA station
- UKE00107962 · YEOVILTON
- Station distance
- 64.8 km from the place centre
- Coverage
- Strong coverage · 29 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for Cardiff is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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