Cardiff weather in April
April in Cardiff: cool, a little rain, with clean air — a great time to visit.
#6 of 12 months in Cardiff · #490 of 897 destinations to visit in April · comfort 79/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Cardiff in April
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Cardiff climate normals — April
| Daytime high | 13°C / 55°F | 🙂 cool |
|---|---|---|
| Nighttime low | 5°C / 42°F | |
| Rainfall | 56 mm / 2.2 in | 🌦 some rain |
| Rainy days | 10 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 5°C / 42°F | |
| Sunshine | 9.7 h/day | |
| Daylight | 13.9 h | |
| Wind | 21 km/h / 13 mph | |
| Snowfall | 0.4 cm / 0.2 in | |
| Air quality (US AQI) | 39 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Cardiff in April — FAQ
- Is April a good time to visit Cardiff?
- April in Cardiff: cool, a little rain, with clean air — a great time to visit. It ranks #6 of 12 months for Cardiff on SeasonMap's comfort score (79/100).
- What is the weather like in Cardiff in April?
- In April, Cardiff averages a daily high of 12.7°C and a low of 5.3°C, with about 56 mm of rain over roughly 10 rainy days.
- What is the air quality in Cardiff in April?
- Cardiff has a mean US Air Quality Index of about 39 in April.