Belfast weather in July
July in Belfast: nice, rainy, with clean air — one of the best months to visit.
#1 of 12 months in Belfast · #201 of 897 destinations to visit in July · comfort 89/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Belfast in July
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Belfast climate normals — July
| Daytime high | 18°C / 64°F | 😎 nice |
|---|---|---|
| Nighttime low | 13°C / 56°F | |
| Rainfall | 81 mm / 3.2 in | 🌧 rainy |
| Rainy days | 14 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 12°C / 53°F | |
| Sunshine | 9.2 h/day | |
| Daylight | 16.6 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 28 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Belfast in July — FAQ
- Is July a good time to visit Belfast?
- July in Belfast: nice, rainy, with clean air — one of the best months to visit. It ranks #1 of 12 months for Belfast on SeasonMap's comfort score (89/100).
- What is the weather like in Belfast in July?
- In July, Belfast averages a daily high of 17.7°C and a low of 13.1°C, with about 80.7 mm of rain over roughly 14 rainy days.
- What is the air quality in Belfast in July?
- Belfast has a mean US Air Quality Index of about 28 in July.