Spring (March–May): Average 45–55°F, cool and humid climate with occasional showers. March and April can be rather chilly. Popular activities: Exploring city attractions, visiting museums, walking along Belfast Harbour. Recommended clothing: Warm jacket, comfortable trousers, raincoat or umbrella.
Summer (June–August): Average 58–60°F, mild but still humid climate with frequent rainfall. Sunny days are less common. Popular activities: Picnics in city parks, visiting Carrickfergus Castle, exploring the Giant’s Causeway. Recommended clothing: Light jacket, trousers or skirt, comfortable shoes, umbrella.
Autumn (September–November): Average 47–57°F, cooler temperatures and increased rainfall, with October being the rainiest month. Variable weather conditions with possible strong winds. Popular activities: Visiting Titanic Belfast, appreciating autumn colours, enjoying local cuisine in cosy pubs. Recommended clothing: Waterproof jacket, warm layers, comfortable shoes.
Winter (December–February): Average 42–45°F, cold and humid climate with moderate rainfall. Frost and snow are possible. Popular activities: Indoor visits to museums, art galleries or theatres, enjoying hot drinks. Recommended clothing: Thick coat, warm layers, scarf, gloves and hat.
Belfast climatological average
Annual average temperature: approx. 51.8°F / Annual rainfall: approx. 942 mm / Summer humidity: 70%–80% / Rainiest month: October
Belfast monthly average temperature and precipitation
Month
Air temperature (°F)
Precipitation (mm)
January
43°F
39.8
February
45.7°F
57
March
45.3°F
89.9
April
48.6°F
73.6
May
55.6°F
66.6
June
58.8°F
70.3
July
60.1°F
89.2
August
61°F
80.6
September
57.7°F
96.5
October
53.4°F
111.1
November
47.5°F
81.4
December
44.4°F
86.6
Belfast weather for the next seven days
12/7
Sunday
Moderate rain
49.7°F/43.1°F
12/8
Monday
Patchy rain nearby
47.5°F/43.1°F
12/9
Tuesday
Moderate rain
57.5°F/46.1°F
12/10
Wednesday
Patchy rain nearby
48°F/42.8°F
12/11
Thursday
Overcast
50.4°F/44.1°F
12/12
Friday
Patchy rain nearby
49.1°F/42.2°F
12/13
Saturday
Sunny
44.6°F/39.8°F
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