Northern Ireland weather by month

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

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum daytime temperature °C
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
Hours of sunshine (daily)
Days with some rainfall
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
Sea temperature °C
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

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Northern Ireland 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.

Top Northern Ireland destinations

Below are average maximum temperatures at popular countries, regions and places in Northern Ireland for next month - February. Select a destination to see the climate guide for all months of the year.

All Northern Ireland destinations

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

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Northern Ireland weather averages

Temperature in Northern Ireland (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
7°C maximum daytime temperature in January in Northern Ireland (Belfast)7
7°C maximum daytime temperature in February in Northern Ireland (Belfast)7
9°C maximum daytime temperature in March in Northern Ireland (Belfast)9
11°C maximum daytime temperature in April in Northern Ireland (Belfast)11
14°C maximum daytime temperature in May in Northern Ireland (Belfast)14
17°C maximum daytime temperature in June in Northern Ireland (Belfast)17
18°C maximum daytime temperature in July in Northern Ireland (Belfast)18
18°C maximum daytime temperature in August in Northern Ireland (Belfast)18
16°C maximum daytime temperature in September in Northern Ireland (Belfast)16
13°C maximum daytime temperature in October in Northern Ireland (Belfast)13
9°C maximum daytime temperature in November in Northern Ireland (Belfast)9
8°C maximum daytime temperature in December in Northern Ireland (Belfast)8
Min temperature (night-time)
1°C minimum night-time temperature in January in Northern Ireland (Belfast)1
1°C minimum night-time temperature in February in Northern Ireland (Belfast)1
2°C minimum night-time temperature in March in Northern Ireland (Belfast)2
4°C minimum night-time temperature in April in Northern Ireland (Belfast)4
6°C minimum night-time temperature in May in Northern Ireland (Belfast)6
9°C minimum night-time temperature in June in Northern Ireland (Belfast)9
11°C minimum night-time temperature in July in Northern Ireland (Belfast)11
11°C minimum night-time temperature in August in Northern Ireland (Belfast)11
9°C minimum night-time temperature in September in Northern Ireland (Belfast)9
7°C minimum night-time temperature in October in Northern Ireland (Belfast)7
3°C minimum night-time temperature in November in Northern Ireland (Belfast)3
2°C minimum night-time temperature in December in Northern Ireland (Belfast)2
Heat & Humidity
No heat & humidity in January in Northern Ireland (Belfast)0
No heat & humidity in February in Northern Ireland (Belfast)0
No heat & humidity in March in Northern Ireland (Belfast)0
No heat & humidity in April in Northern Ireland (Belfast)0
No heat & humidity in May in Northern Ireland (Belfast)0
No heat & humidity in June in Northern Ireland (Belfast)0
No heat & humidity in July in Northern Ireland (Belfast)0
No heat & humidity in August in Northern Ireland (Belfast)0
No heat & humidity in September in Northern Ireland (Belfast)0
No heat & humidity in October in Northern Ireland (Belfast)0
No heat & humidity in November in Northern Ireland (Belfast)0
No heat & humidity in December in Northern Ireland (Belfast)0
Sea temperature
9°C sea temperature in January in Northern Ireland (Belfast)9
8°C sea temperature in February in Northern Ireland (Belfast)8
7°C sea temperature in March in Northern Ireland (Belfast)7
8°C sea temperature in April in Northern Ireland (Belfast)8
9°C sea temperature in May in Northern Ireland (Belfast)9
11°C sea temperature in June in Northern Ireland (Belfast)11
13°C sea temperature in July in Northern Ireland (Belfast)13
13°C sea temperature in August in Northern Ireland (Belfast)13
14°C sea temperature in September in Northern Ireland (Belfast)14
13°C sea temperature in October in Northern Ireland (Belfast)13
12°C sea temperature in November in Northern Ireland (Belfast)12
10°C sea temperature in December in Northern Ireland (Belfast)10

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

Sunshine & UV index in Northern Ireland

  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 Northern Ireland (Belfast)8
10 hours of daylight per day in February in Northern Ireland (Belfast)10
12 hours of daylight per day in March in Northern Ireland (Belfast)12
14 hours of daylight per day in April in Northern Ireland (Belfast)14
16 hours of daylight per day in May in Northern Ireland (Belfast)16
17 hours of daylight per day in June in Northern Ireland (Belfast)17
17 hours of daylight per day in July in Northern Ireland (Belfast)17
15 hours of daylight per day in August in Northern Ireland (Belfast)15
13 hours of daylight per day in September in Northern Ireland (Belfast)13
10 hours of daylight per day in October in Northern Ireland (Belfast)10
8 hours of daylight per day in November in Northern Ireland (Belfast)8
7 hours of daylight per day in December in Northern Ireland (Belfast)7
UV Index (Maximum)
No UV (maximum) index in January in Northern Ireland (Belfast)0
UV (maximum) index 1 (Low) in February in Northern Ireland (Belfast)1
UV (maximum) index 2 (Low) in March in Northern Ireland (Belfast)2
UV (maximum) index 3 (Moderate) in April in Northern Ireland (Belfast)3
UV (maximum) index 5 (Moderate) in May in Northern Ireland (Belfast)5
UV (maximum) index 6 (High) in June in Northern Ireland (Belfast)6
UV (maximum) index 6 (High) in July in Northern Ireland (Belfast)6
UV (maximum) index 5 (Moderate) in August in Northern Ireland (Belfast)5
UV (maximum) index 3 (Moderate) in September in Northern Ireland (Belfast)3
UV (maximum) index 2 (Low) in October in Northern Ireland (Belfast)2
UV (maximum) index 1 (Low) in November in Northern Ireland (Belfast)1
No UV (maximum) index in December in Northern Ireland (Belfast)0

Rainfall in Northern Ireland

  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 Northern Ireland (Belfast)20
16 days with some rainfall in February in Northern Ireland (Belfast)16
19 days with some rainfall in March in Northern Ireland (Belfast)19
15 days with some rainfall in April in Northern Ireland (Belfast)15
16 days with some rainfall in May in Northern Ireland (Belfast)16
15 days with some rainfall in June in Northern Ireland (Belfast)15
15 days with some rainfall in July in Northern Ireland (Belfast)15
17 days with some rainfall in August in Northern Ireland (Belfast)17
17 days with some rainfall in September in Northern Ireland (Belfast)17
19 days with some rainfall in October in Northern Ireland (Belfast)19
19 days with some rainfall in November in Northern Ireland (Belfast)19
20 days with some rainfall in December in Northern Ireland (Belfast)20
Average monthly rainfall (mm)
101 mm monthly rainfall in January in Northern Ireland (Belfast)101
71 mm monthly rainfall in February in Northern Ireland (Belfast)71
78 mm monthly rainfall in March in Northern Ireland (Belfast)78
63 mm monthly rainfall in April in Northern Ireland (Belfast)63
65 mm monthly rainfall in May in Northern Ireland (Belfast)65
68 mm monthly rainfall in June in Northern Ireland (Belfast)68
63 mm monthly rainfall in July in Northern Ireland (Belfast)63
89 mm monthly rainfall in August in Northern Ireland (Belfast)89
94 mm monthly rainfall in September in Northern Ireland (Belfast)94
100 mm monthly rainfall in October in Northern Ireland (Belfast)100
96 mm monthly rainfall in November in Northern Ireland (Belfast)96
94 mm monthly rainfall in December in Northern Ireland (Belfast)94

Compare Northern Ireland weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for Nothern Ireland (Belfast) and the UK (London).

Maximum daytime temperature (°C)

Nothern Ireland (Belfast)
UK (London)
7
7
7
7
9
10
11
13
14
17
17
20
18
22
18
22
16
19
13
15
9
10
8
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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

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