Average annual temperature is 13.3 °C
Absolute maximum temperature: 33.6 °C
Absolute minimum temperature: -8.6 °C
Number of sunny days: 173 days
Number of rainy days: 185 days
Number of snow days: 7 days
Look at detailed online map of Belfast
* Weather data for Belfast United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 16.3 | 22.1 | 23.4 | 27.3 | 30.0 | 32.8 | 32.9 | 33.6 | 33.6 | 29.4 | 24.6 | 16.0 |
| Average daytime temperature (°C) | 7.8 | 12.4 | 12.6 | 18.5 | 23.0 | 27.1 | 29.7 | 28.8 | 26.3 | 19.7 | 12.7 | 9.4 |
| Average temperature (°C) | 3.7 | 5.5 | 6.0 | 12.1 | 16.8 | 21.1 | 24.0 | 23.1 | 20.3 | 14.3 | 7.1 | 4.8 |
| Average night temperature (°C) | 0.7 | 0.8 | 1.3 | 6.6 | 11.6 | 15.6 | 19.5 | 18.1 | 15.2 | 10.0 | 3.1 | 1.5 |
| Absolute minimum temperature (°C) | -6.0 | -8.6 | -7.8 | 0.1 | 2.9 | 10.8 | 15.5 | 12.7 | 10.2 | -1.1 | -6.8 | -6.4 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.7 | 12.0 | 13.2 | 14.3 | 14.9 | 14.6 | 13.7 | 12.4 | 11.2 | 10.1 | 9.5 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.0 | 7.6 | 7.5 | 8.9 | 10.2 | 11.0 | 11.7 | 11.3 | 10.3 | 7.5 | 7.7 | 4.8 |
| Precipitation (mm) | 121 | 54 | 139 | 79 | 57 | 100 | 86 | 103 | 41 | 89 | 36 | 76 |
| Sunny days | 5 | 16 | 14 | 14 | 19 | 15 | 8 | 15 | 18 | 12 | 24 | 13 |
| Rainy days | 22 | 12 | 14 | 16 | 12 | 15 | 23 | 16 | 12 | 19 | 6 | 18 |
| Snow days | 4 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Belfast during the most sunny months:
The largest precipitation sum in Belfast is at