Cardiff weather in July
July in Cardiff: nice, a little rain, with clean air — one of the best months to visit.
#1 of 12 months in Cardiff · #136 of 897 destinations to visit in July · comfort 91/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Cardiff in July
No notes yet. Open Cardiff on the map to add the first one.
Cardiff climate normals — July
| Daytime high | 20°C / 68°F | 😎 nice |
|---|---|---|
| Nighttime low | 14°C / 57°F | |
| Rainfall | 78 mm / 3.1 in | 🌦 some rain |
| Rainy days | 13 days | |
| Humidity | 76% | 💦 very humid |
| Dew point | 13°C / 55°F | |
| Sunshine | 10.8 h/day | |
| Daylight | 16.1 h | |
| Wind | 21 km/h / 13 mph | |
| Air quality (US AQI) | 30 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Cardiff?
Loading map…
Cardiff in July — FAQ
- Is July a good time to visit Cardiff?
- July in Cardiff: nice, a little rain, with clean air — one of the best months to visit. It ranks #1 of 12 months for Cardiff on SeasonMap's comfort score (91/100).
- What is the weather like in Cardiff in July?
- In July, Cardiff averages a daily high of 20°C and a low of 13.9°C, with about 78.4 mm of rain over roughly 12.6 rainy days.
- What is the air quality in Cardiff in July?
- Cardiff has a mean US Air Quality Index of about 30 in July.