Belfast, United Kingdom Climate & Monthly Averages
The climate of 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).
Climate 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.
How Belfast compares
- The city sees 7.2 hours of sunshine on an average day - duller than all but 3% of the 3496 cities we track.
- Belfast averages 50°F (10°C) across the year - cooler than all but 9% of the 3496 cities we track.
- 29% of the year's precipitation falls in its wettest three months - more evenly spread than all but 9% of the 3496 cities we track.
Ranked against every city in our dataset, each measured on the same ten-year window.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 45° | 37° | 14 | 2.7 in | 3.8 h/day | 7.8 h | 44% | 86% |
| February | 47° | 38° | 14 | 3.1 in | 5.4 h/day | 9.6 h | 49% | 83% |
| March | 49° | 38° | 16 | 3.2 in | 6.8 h/day | 11.7 h | 53% | 82% |
| April | 52° | 41° | 13 | 2.4 in | 9.0 h/day | 14.0 h | 42% | 79% |
| May | 58° | 46° | 14 | 2.8 in | 10.5 h/day | 16.0 h | 45% | 78% |
| June | 63° | 51° | 14 | 3.2 in | 10.9 h/day | 17.2 h | 48% | 78% |
| July | 65° | 53° | 18 | 3.9 in | 9.8 h/day | 16.7 h | 56% | 80% |
| August | 64° | 54° | 18 | 4.1 in | 9.3 h/day | 14.9 h | 57% | 82% |
| September | 61° | 51° | 14 | 3.4 in | 7.7 h/day | 12.6 h | 46% | 83% |
| October | 56° | 47° | 14 | 3.5 in | 5.7 h/day | 10.4 h | 45% | 84% |
| November | 50° | 42° | 14 | 3.5 in | 4.1 h/day | 8.3 h | 46% | 86% |
| December | 47° | 40° | 15 | 3.9 in | 2.9 h/day | 7.3 h | 47% | 88% |
Belfast month by month
Average high and low for each month, with the bar showing where it sits in Belfast's year (left is the coldest night, right is the warmest afternoon).
January
- Rain
- 14 days
- Sunshine
- 3.8 h
- Daylight
- 7.8 h
February
- Rain
- 14 days
- Sunshine
- 5.4 h
- Daylight
- 9.6 h
- Snow
- 1 day
March
- Rain
- 16 days
- Sunshine
- 6.8 h
- Daylight
- 11.7 h
April
- Rain
- 13 days
- Sunshine
- 9.0 h
- Daylight
- 14.0 h
May
- Rain
- 14 days
- Sunshine
- 10.5 h
- Daylight
- 16.0 h
June
- Rain
- 14 days
- Sunshine
- 10.9 h
- Daylight
- 17.2 h
July
- Rain
- 18 days
- Sunshine
- 9.8 h
- Daylight
- 16.7 h
August
- Rain
- 18 days
- Sunshine
- 9.3 h
- Daylight
- 14.9 h
September
- Rain
- 14 days
- Sunshine
- 7.7 h
- Daylight
- 12.6 h
October
- Rain
- 14 days
- Sunshine
- 5.7 h
- Daylight
- 10.4 h
November
- Rain
- 14 days
- Sunshine
- 4.1 h
- Daylight
- 8.3 h
December
- Rain
- 15 days
- Sunshine
- 2.9 h
- Daylight
- 7.3 h
Warmer places to go, by month: January · February · March · April · May · June · July · August · September · October · November · December
Seasons in Belfast
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.
Climate questions, answered
Is Belfast cold in winter?
How does Belfast compare to other cities?
How much sun does Belfast get?
How warm is Belfast on average?
How often does it rain in Belfast?
How humid does Belfast get?
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 sit near 60°F (16°C), with rain on about 15 days a month. For the same question asked the other way round, see where else is warm in April.
Pack for Belfast with a warm jacket and layers for the cooler season and proper waterproofs rather than an umbrella - wet days are the norm here. Even in July, lows of 53°F (12°C) make an extra layer worth the space.
Belfast temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need the precipitation in other units? The mm-to-inches rainfall converter handles it.