Belfast Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Belfast.
Climate overview of Belfast
Belfast, Antrim County, United Kingdom, experiences moderate temperature changes through the seasons. July is the warmest month with daytime highs of 19°C (66°F), while February is the coolest at 9°C (48°F).
With around 1042 mm (41 in) of annual rainfall, Belfast has a notably wet climate. The wettest month is October. The sunniest month is May, with 6.1 hours of sunshine per day on average.
Belfast Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Belfast — and find the best time to visit.
Monthly Temperature in Belfast
The climate in Belfast experiences moderate temperature changes, with mild shifts between seasons. Average daytime temperatures reach a pleasant 19°C (66°F) in July. In February, the coolest month of the year, temperatures drop to a chilly 9°C (48°F).
At night, temperatures range from around 12°C (54°F) in July to 4°C (39°F) in February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Belfast
Belfast has a relatively rainy climate with high precipitation levels, averaging 1042 mm (41 in) of rainfall annually. Despite minor fluctuations, Belfast enjoys fairly consistent precipitation throughout the year. In October, you can expect around 100 mm (3.9 in) of precipitation, while in March, Belfast receives about 73 mm (2.9 in). For more details, please visit our Belfast Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Belfast
Belfast can be enjoyed more throughout the sunniest month of May under a blue sky, with approximately 6.1 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 1.3 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Water Temperature in Belfast
The mean water temperature over the year ranges from 7°C (45°F) in February to 13°C (55°F) in August.
Water temperature over the year
Humidity in Belfast by Month
The city experiences its highest humidity in September, reaching 91%. In February, the humidity drops to its lowest level at 86%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Belfast
The mean wind speed over the year ranges from 4 m/s (8 knots) in April, May, June, July, August and September to 5 m/s (10 knots) in January, February, March, October, November and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Belfast
Rainfall during this time ranges from 83 mm (3.3 in) in September to 93 mm (3.7 in) in July. This means you can expect a mix of sunny days and occasional showers. Planning your next adventure but unsure where to go? Our climate tool suggests perfect locations tailored to your preferred weather conditions. Discover your ideal travel destination with our weather planner.
Frequently asked questions about the climate in Belfast
What is the best time to visit Belfast?
July and August typically offer the most optimal weather in Belfast. In contrast, January, February, March and December tend to have less optimal conditions.
What temperatures can I expect in Belfast?
Daytime highs range from 9°C (48°F) in February to 19°C (66°F) in July. Nighttime lows range from 4°C (39°F) to 12°C (54°F).
How much rain does Belfast get?
Annual rainfall is around 1042 mm (41 in). October is the wettest month with 100 mm (3.9 in), while March is the driest with 73 mm (2.9 in).
How sunny is Belfast?
Belfast receives around 1,297 hours of sunshine per year. May is the sunniest month with 184 hours, while December is the cloudiest with just 39 hours.
Belfast 3-Day Forecast
Belfast 3-Day Forecast
Belfast on the map
Belfast is highlighted — select any city to see its climate.
Popular this month
Where to go in July — average daytime high across popular destinations.
London
23°C (73°F) Bath22°C (72°F) York22°C (72°F) Manchester
21°C (70°F) Edinburgh
19°C (66°F) Glasgow19°C (66°F) Torquay20°C (68°F) Blackpool19°C (66°F) 
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