Belfast weather by month

Check out Belfast weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Belfast (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
7°C maximum daytime temperature in January in Belfast7
7°C maximum daytime temperature in February in Belfast7
9°C maximum daytime temperature in March in Belfast9
11°C maximum daytime temperature in April in Belfast11
14°C maximum daytime temperature in May in Belfast14
17°C maximum daytime temperature in June in Belfast17
18°C maximum daytime temperature in July in Belfast18
18°C maximum daytime temperature in August in Belfast18
16°C maximum daytime temperature in September in Belfast16
13°C maximum daytime temperature in October in Belfast13
9°C maximum daytime temperature in November in Belfast9
8°C maximum daytime temperature in December in Belfast8
Min temperature (night-time)
1°C minimum night-time temperature in January in Belfast1
1°C minimum night-time temperature in February in Belfast1
2°C minimum night-time temperature in March in Belfast2
4°C minimum night-time temperature in April in Belfast4
6°C minimum night-time temperature in May in Belfast6
9°C minimum night-time temperature in June in Belfast9
11°C minimum night-time temperature in July in Belfast11
11°C minimum night-time temperature in August in Belfast11
9°C minimum night-time temperature in September in Belfast9
7°C minimum night-time temperature in October in Belfast7
3°C minimum night-time temperature in November in Belfast3
2°C minimum night-time temperature in December in Belfast2
Heat & Humidity
No heat & humidity in January in Belfast0
No heat & humidity in February in Belfast0
No heat & humidity in March in Belfast0
No heat & humidity in April in Belfast0
No heat & humidity in May in Belfast0
No heat & humidity in June in Belfast0
No heat & humidity in July in Belfast0
No heat & humidity in August in Belfast0
No heat & humidity in September in Belfast0
No heat & humidity in October in Belfast0
No heat & humidity in November in Belfast0
No heat & humidity in December in Belfast0
Sea temperature
9°C sea temperature in January in Belfast9
8°C sea temperature in February in Belfast8
7°C sea temperature in March in Belfast7
8°C sea temperature in April in Belfast8
9°C sea temperature in May in Belfast9
11°C sea temperature in June in Belfast11
13°C sea temperature in July in Belfast13
13°C sea temperature in August in Belfast13
14°C sea temperature in September in Belfast14
13°C sea temperature in October in Belfast13
12°C sea temperature in November in Belfast12
10°C sea temperature in December in Belfast10

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & Daylight in Belfast

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
8 hours of daylight per day in January in Belfast8
10 hours of daylight per day in February in Belfast10
12 hours of daylight per day in March in Belfast12
14 hours of daylight per day in April in Belfast14
16 hours of daylight per day in May in Belfast16
17 hours of daylight per day in June in Belfast17
17 hours of daylight per day in July in Belfast17
15 hours of daylight per day in August in Belfast15
13 hours of daylight per day in September in Belfast13
10 hours of daylight per day in October in Belfast10
8 hours of daylight per day in November in Belfast8
7 hours of daylight per day in December in Belfast7
UV Index (Maximum)
No UV (maximum) index in January in Belfast0
UV (maximum) index 1 (Low) in February in Belfast1
UV (maximum) index 2 (Low) in March in Belfast2
UV (maximum) index 3 (Moderate) in April in Belfast3
UV (maximum) index 5 (Moderate) in May in Belfast5
UV (maximum) index 6 (High) in June in Belfast6
UV (maximum) index 6 (High) in July in Belfast6
UV (maximum) index 5 (Moderate) in August in Belfast5
UV (maximum) index 3 (Moderate) in September in Belfast3
UV (maximum) index 2 (Low) in October in Belfast2
UV (maximum) index 1 (Low) in November in Belfast1
No UV (maximum) index in December in Belfast0

Rainfall in Belfast

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
20 days with some rainfall in January in Belfast20
16 days with some rainfall in February in Belfast16
19 days with some rainfall in March in Belfast19
15 days with some rainfall in April in Belfast15
16 days with some rainfall in May in Belfast16
15 days with some rainfall in June in Belfast15
15 days with some rainfall in July in Belfast15
17 days with some rainfall in August in Belfast17
17 days with some rainfall in September in Belfast17
19 days with some rainfall in October in Belfast19
19 days with some rainfall in November in Belfast19
20 days with some rainfall in December in Belfast20
Average monthly rainfall (mm)
101 mm monthly rainfall in January in Belfast101
71 mm monthly rainfall in February in Belfast71
78 mm monthly rainfall in March in Belfast78
63 mm monthly rainfall in April in Belfast63
65 mm monthly rainfall in May in Belfast65
68 mm monthly rainfall in June in Belfast68
63 mm monthly rainfall in July in Belfast63
89 mm monthly rainfall in August in Belfast89
94 mm monthly rainfall in September in Belfast94
100 mm monthly rainfall in October in Belfast100
96 mm monthly rainfall in November in Belfast96
94 mm monthly rainfall in December in Belfast94

More about Belfast

Belfast by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for Northern Ireland (Belfast) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Belfast?

Belfast has a temperate climate with warm summers and some rainfall in all months.

Metric (°C / mm)  |  Imperial (°F / inches)

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Tropical storm risk: Belfast hurricane season

% of month affected by tropical storms
0
0
0
0
0
0
0
0
0
0
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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More about the UK

Compare Belfast with the USA

Below the Belfast chart shows average maximum daytime temperature for Belfast, Northern Ireland, UK and the USA (Washington).

Maximum daytime temperature (°C)

Belfast, Northern Ireland, UK
USA (Washington)
7
5
7
7
9
13
11
19
14
24
17
29
18
31
18
30
16
26
13
20
9
14
8
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

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