Belfast, United Kingdom Weather
Belfast hourly forecast: next 24 hours
Today's high of 60°F (16°C) is right in line with the typical September high of 61°F (16°C).
Current conditions in detail
Belfast weather tomorrow (Thursday, September 17)
Tomorrow in Belfast looks patchy rain nearby, with a high of 58° and an overnight low of 48°. There is a 67% chance of rain - plan accordingly. Winds top out near 19 mph, and the UV index reaches 2 (low).
Belfast 14-day forecast
About the weather in Belfast
Belfast averages 50°F (10°C) across the year, with 7.2 hours of sunshine a day and 39.7 inches (1008 mm) of precipitation. The spread runs from January, at 45°F (7°C), to July, at 65°F (18°C).
Belfast weather: quick facts
- Hottest month: July - highs near 65°F (18°C)
- Coldest month: January - highs near 45°F (7°C)
- Decade extremes (2015-2024): 81°F (27°C) high · 24°F (-5°C) low
- Wettest month: August (18 rainy days) · Sunniest: June (10.9 h sun/day)
- Climate type: oceanic
- Annual swing: 10°C between the average warmest and coolest month · day to night: 6°C
- Snow: about 3 days a year
- Average humidity: 82%
Temperatures through the year
July is the warm end of the year, averaging 65°F (18°C) by day and 53°F (12°C) overnight. January bottoms out at 45°F (7°C) in daylight, 37°F (3°C) after dark. Relative humidity averages 82% across the year, more humid than 92% of the 3496 cities in our dataset.
Rain, sun and snow
Days and nights are about 6°C apart on average - narrower than all but 6% of the 3496 cities in our dataset. Snow falls on roughly 3 days a year, mostly January through March. Precipitation concentrates in August - 4.1 inches (104 mm) on 18 days - and thins out by April. The gridded 2015-2024 daily record for this location tops out at 81°F (27°C) and bottoms at 24°F (-5°C) - decade extremes, not all-time station records.
Season by season
Spring (March through May)
Spring in Belfast is brisk and cold, with daytime highs averaging 53°F (12°C) and nights around 42°F (5°C); rain falls on around 43 of the 90 days.
Summer (June through August)
Summer in Belfast stays on the cool side of mild, with daytime highs averaging 64°F (18°C) and nights around 53°F (12°C); rain falls on around 49 of the 90 days. Daylight is generous - around 10.0 hours of sun a day.
Fall (September through November)
Fall in Belfast is mild, with daytime highs averaging 56°F (13°C) and nights around 47°F (8°C); rain falls on around 42 of the 90 days.
Winter (December through February)
Winter stays firmly cold here - highs near 46°F (8°C), nights near 38°F (4°C), and rain falls on around 42 of the 90 days.
Average temperatures in Belfast by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 45° | 37° | 14 | 2.7 in | 3.8 h/day | 86% |
| February | 47° | 38° | 14 | 3.1 in | 5.4 h/day | 83% |
| March | 49° | 38° | 16 | 3.2 in | 6.8 h/day | 82% |
| April | 52° | 41° | 13 | 2.4 in | 9.0 h/day | 79% |
| May | 58° | 46° | 14 | 2.8 in | 10.5 h/day | 78% |
| June | 63° | 51° | 14 | 3.2 in | 10.9 h/day | 78% |
| July | 65° | 53° | 18 | 3.9 in | 9.8 h/day | 80% |
| August | 64° | 54° | 18 | 4.1 in | 9.3 h/day | 82% |
| September | 61° | 51° | 14 | 3.4 in | 7.7 h/day | 83% |
| October | 56° | 47° | 14 | 3.5 in | 5.7 h/day | 84% |
| November | 50° | 42° | 14 | 3.5 in | 4.1 h/day | 86% |
| December | 47° | 40° | 15 | 3.9 in | 2.9 h/day | 88% |