Temperature
Cold by day, freezing at night.
Belfast is usually most comfortable in July and August. Typical daytime highs range from 30–76°F across the year. Rain is frequent in many months.

Cold by day, freezing at night.
Some precipitation is expected this month.
A mix of sunshine and cloud.
Humidity is rarely noticeable in the cool air.
In November, afternoons feel about 35° and nights feel near 27°.
Partly cloudy skies this month.
Breezy November days can feel brisker in open spots.
November late afternoons are around 42°F, easing to about 40°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 30 | 15 | 3.6 | 10 | 6.3 | 71 |
| Feb | 32 | 17 | 3.1 | 9 | 7.3 | 70 |
| Mar | 39 | 25 | 3.8 | 10 | 8.1 | 69 |
| Apr | 50 | 36 | 3.9 | 11 | 8.8 | 69 |
| May | 61 | 46 | 3.4 | 11 | 9.6 | 74 |
| Jun | 70 | 54 | 3.7 | 11 | 10.4 | 78 |
| Jul | 76 | 60 | 3.0 | 10 | 11.4 | 79 |
| Aug | 75 | 60 | 3.0 | 9 | 10.7 | 79 |
| Sep | 68 | 53 | 3.8 | 9 | 8.9 | 80 |
| Oct | 57 | 44 | 4.7 | 10 | 7.2 | 78 |
| Nov | 46 | 34 | 3.9 | 10 | 6.0 | 75 |
| Dec | 35 | 23 | 4.6 | 12 | 5.6 | 74 |
Similar climates
Want a side-by-side climate view? Compare Belfast with New York City.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Aug 27, 2026
Data & methodology