Cardiff Weather in December
8.7°C high · 3.6°C low · 111 mm rain · 0.9h sun
Dec is a cool month in Cardiff — not peak season, but a good time to avoid crowds.
December at a glance
| Metric | Value |
|---|---|
| Average high | 8.7°C |
| Average low | 3.6°C |
| Rainfall | 111 mm |
| Sunshine | 0.9 hours/day |
| Daylight | 7.6 hours |
What to pack in December
Pack a warm coat and layers, plus a raincoat and umbrella for Cardiff in December.
Cardiff weather by month
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Frequently asked questions
What is the weather in Cardiff in December?
Highs of 8.7°C and lows of 3.6°C, with about 111 mm of rain and 0.9 hours of sunshine per day.
Is December a good time to visit Cardiff?
Dec is a cool month in Cardiff — not peak season, but a good time to avoid crowds.
What to do in Cardiff · Best time to visit Cardiff
Climate data: Open-Meteo Historical (ERA5), 1991–2020. CC BY 4.0.