Cardiff weather in March
March in Cardiff: cool, rainy, with clean air — a great time to visit.
#7 of 12 months in Cardiff · #646 of 897 destinations to visit in March · comfort 70/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Cardiff in March
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Cardiff climate normals — March
| Daytime high | 10°C / 50°F | 🙂 cool |
|---|---|---|
| Nighttime low | 5°C / 40°F | |
| Rainfall | 91 mm / 3.6 in | 🌧 rainy |
| Rainy days | 15 days | |
| Humidity | 82% | 💦 very humid |
| Dew point | 5°C / 40°F | |
| Sunshine | 6.9 h/day | |
| Daylight | 11.9 h | |
| Wind | 26 km/h / 16 mph | |
| Snowfall | 1.6 cm / 0.6 in | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Cardiff in March — FAQ
- Is March a good time to visit Cardiff?
- March in Cardiff: cool, rainy, with clean air — a great time to visit. It ranks #7 of 12 months for Cardiff on SeasonMap's comfort score (70/100).
- What is the weather like in Cardiff in March?
- In March, Cardiff averages a daily high of 10.2°C and a low of 4.7°C, with about 90.8 mm of rain over roughly 14.6 rainy days.
- What is the air quality in Cardiff in March?
- Cardiff has a mean US Air Quality Index of about 35 in March.
- Does it snow in Cardiff in March?
- Cardiff sees roughly 1.6 cm of snowfall in March.