Belfast, United Kingdom Climate & Monthly Averages
The climate of Belfast
Belfast has a oceanic climate, marked by mild temperatures year-round with regular rainfall. Average daytime highs range from about 45°F (7°C) in January to around 65°F (18°C) in July, and the city records roughly 176 days of measurable precipitation a year.
Climate quick facts
- Hottest month: July - highs near 65°F (18°C)
- Coldest month: January - highs near 45°F (7°C)
- Record high: 81°F (27°C) · Record low: 24°F (-5°C) (2015–2024)
- Wettest month: August (18 rainy days) · Sunniest: June (10.9 h sun/day)
- Climate type: oceanic - mild temperatures year-round with regular rainfall
- Snow: about 3 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 65°F (18°C) and overnight lows stay near 53°F (12°C). The coolest month is January, with typical highs of 45°F (7°C) and lows around 37°F (3°C). Based on 2015–2024 weather data, temperatures have reached as high as 81°F (27°C) and dropped as low as 24°F (-5°C).
Rain, sun and snow
August is usually the wettest month. It brings about 4.1 inches (104 mm) of rain over 18 days, while April is the driest. June brings the most sunshine, averaging 10.9 hours of sun a day. Snow falls on about 3 days in a typical year, mostly from January through March.
Monthly climate table
| 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% |
Belfast month by month
Belfast weather in January
January brings highs around 45°F (7°C), lows near 37°F (3°C), about 14 wet days - typically the coldest month of the year in Belfast.
Belfast weather in February
February brings highs around 47°F (8°C), lows near 38°F (3°C), about 14 wet days and roughly 1 snowy days.
Belfast weather in March
March brings highs around 49°F (9°C), lows near 38°F (4°C), about 16 wet days.
Belfast weather in April
April brings highs around 52°F (11°C), lows near 41°F (5°C), about 13 wet days - typically the driest month of the year in Belfast.
Belfast weather in May
May brings highs around 58°F (15°C), lows near 46°F (8°C), about 14 wet days.
Belfast weather in June
June brings highs around 63°F (17°C), lows near 51°F (11°C), about 14 wet days - typically the sunniest month of the year in Belfast.
Belfast weather in July
July brings highs around 65°F (18°C), lows near 53°F (12°C), about 18 wet days - typically the hottest month of the year in Belfast.
Belfast weather in August
August brings highs around 64°F (18°C), lows near 54°F (12°C), about 18 wet days - typically the wettest month of the year in Belfast.
Belfast weather in September
September brings highs around 61°F (16°C), lows near 51°F (10°C), about 14 wet days.
Belfast weather in October
October brings highs around 56°F (13°C), lows near 47°F (8°C), about 14 wet days.
Belfast weather in November
November brings highs around 50°F (10°C), lows near 42°F (6°C), about 14 wet days.
Belfast weather in December
December brings highs around 47°F (8°C), lows near 40°F (4°C), about 15 wet days.
Seasons in Belfast
Spring (March through May)
Spring in Belfast runs cold, with daytime highs averaging 53°F (12°C) and nights around 42°F (5°C); expect showers on roughly 43 days across the season.
Summer (June through August)
Summer in Belfast is crisp but comfortable, with daytime highs averaging 64°F (18°C) and nights around 53°F (12°C); expect showers on roughly 49 days across the season.
Fall (September through November)
Fall in Belfast is mild, with daytime highs averaging 56°F (13°C) and nights around 47°F (8°C); expect showers on roughly 42 days across the season.
Winter (December through February)
Winter in Belfast runs cold, with daytime highs averaging 46°F (8°C) and nights around 38°F (4°C); expect showers on roughly 42 days across the season.
Climate questions, answered
What is the average temperature in Belfast?
Is Belfast hot in summer?
Is Belfast cold in winter?
How many rainy days does Belfast get in a year?
Best time to visit Belfast
The best time to visit Belfast is generally April to September, when warm days, manageable rainfall and plenty of daylight line up. Daytime temperatures in that window typically sit near 60°F (16°C).
Pack for Belfast with a warm jacket and layers for the cooler season; a compact umbrella or rain shell - showers are a regular feature. Evenings can feel noticeably cooler than afternoons - July nights average 53°F (12°C).
Belfast temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.