Northern Ireland climate by month
8-year averages · when to visit| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Belfast | 7° | 8° | 9° | 12° | 15° | 17° | 19° | 18° | 16° | 13° | 10° | 8° |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Belfast | 12 | 14 | 16 | 13 | 14 | 15 | 17 | 18 | 15 | 16 | 15 | 15 |
Figures are averaged over 8 years of ERA5 reanalysis; sea temps come from ocean reanalysis, and UV is derived from solar elevation.
Belfast climate in August
8-year averages · when to visit
| July | August | September | |
|---|---|---|---|
| Average temperature | → 15°C | 15°C | ▼ 13°C |
| Typical high | ▼ 19°C | 18°C | ▼ 16°C |
| Typical low | → 12°C | 12°C | ▼ 10°C |
| Precipitation | ▲ 95 mm | 108 mm | ▼ 99 mm |
| Wet days | ▲ 17 d | 18 d | ▼ 15 d |
| Humidity | → 80% | 80% | ▲ 83% |
| Sunshine per day | ▼ 9.9 h | 9.6 h | ▼ 7.7 h |
| Cloud cover | ▼ 40% | 36% | ▲ 39% |
| Midday UV | ▼ 9 | 7 | ▼ 5 |
| Daylight | 16:38 | 14:51 | 12:42 |
| Our take | Acceptable | Acceptable | Acceptable |
August temperatures day by day daily mean + smoothed trend · °C
August precipitation day by day mm
August UV day by day clear-sky midday value
Figures are averaged over 8 years of ERA5 reanalysis; sea temps come from ocean reanalysis, and UV is derived from solar elevation.
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NBM + global weather models
Updated: 10:58 AM
Northern Ireland, United Kingdom · 7 weather points · Climate reference: Belfast (54.60°N, 5.93°W) · Europe/London