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 (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
45°F maximum daytime temperature in January in Belfast45
45°F maximum daytime temperature in February in Belfast45
48°F maximum daytime temperature in March in Belfast48
52°F maximum daytime temperature in April in Belfast52
57°F maximum daytime temperature in May in Belfast57
63°F maximum daytime temperature in June in Belfast63
64°F maximum daytime temperature in July in Belfast64
64°F maximum daytime temperature in August in Belfast64
61°F maximum daytime temperature in September in Belfast61
55°F maximum daytime temperature in October in Belfast55
48°F maximum daytime temperature in November in Belfast48
46°F maximum daytime temperature in December in Belfast46
Min temperature (night-time)
34°F minimum night-time temperature in January in Belfast34
34°F minimum night-time temperature in February in Belfast34
36°F minimum night-time temperature in March in Belfast36
39°F minimum night-time temperature in April in Belfast39
43°F minimum night-time temperature in May in Belfast43
48°F minimum night-time temperature in June in Belfast48
52°F minimum night-time temperature in July in Belfast52
52°F minimum night-time temperature in August in Belfast52
48°F minimum night-time temperature in September in Belfast48
45°F minimum night-time temperature in October in Belfast45
37°F minimum night-time temperature in November in Belfast37
36°F minimum night-time temperature in December in Belfast36
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
48°F sea temperature in January in Belfast48
46°F sea temperature in February in Belfast46
45°F sea temperature in March in Belfast45
46°F sea temperature in April in Belfast46
48°F sea temperature in May in Belfast48
52°F sea temperature in June in Belfast52
55°F sea temperature in July in Belfast55
55°F sea temperature in August in Belfast55
57°F sea temperature in September in Belfast57
55°F sea temperature in October in Belfast55
54°F sea temperature in November in Belfast54
50°F sea temperature in December in Belfast50

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 (inches)
4.0 inches monthly rainfall in January in Belfast4.0
2.8 inches monthly rainfall in February in Belfast2.8
3.1 inches monthly rainfall in March in Belfast3.1
2.5 inches monthly rainfall in April in Belfast2.5
2.6 inches monthly rainfall in May in Belfast2.6
2.7 inches monthly rainfall in June in Belfast2.7
2.5 inches monthly rainfall in July in Belfast2.5
3.5 inches monthly rainfall in August in Belfast3.5
3.7 inches monthly rainfall in September in Belfast3.7
3.9 inches monthly rainfall in October in Belfast3.9
3.8 inches monthly rainfall in November in Belfast3.8
3.7 inches monthly rainfall in December in Belfast3.7

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)  |  Imperial (°F)

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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 (°F)

Belfast, Northern Ireland, UK
USA (Washington)
45
41
45
45
48
55
52
66
57
75
63
84
64
88
64
86
61
79
55
68
48
57
46
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C)  |  Imperial (°F)

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