Belfast Climate by Month
On this page you can find the weather by month for Belfast. Who is making a city trip to this city can expect clouds and rainy days. Because of its Sea climate Belfast has mild winters and pretty warm summers. Spring from May till June is a good time to visit Belfast since it's the most sunny period of the year (with an average of six hours of sunshine a day). Summerdays tend to be more cloudy.
Average day and night temperature
In Belfast, seasonal changes bring about a moderate variation in temperatures. Average daytime temperatures reach a pleasant 20°C in July. In January, the coolest month of the year, temperatures drop to a chilly 9°C. At night, expect cooler temperatures, averaging 3°C during this month.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Generally, Belfast has a moderate amount of precipitation, averaging 974 mm of rainfall annually. Despite minor fluctuations, Belfast enjoys fairly consistent precipitation throughout the year. In August, you can expect around 91 mm of precipitation, while in March, Belfast receives about 69 mm.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
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.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average water temperature
The mean water temperature over the year in Belfast ranges from 7°C in February to 13°C in August.
Water temperature over the year
Average humidity
The relative humidity is high throughout the year in Belfast.
Relative humidity over the year
Average wind speed
The mean wind speed over the year in Belfast ranges from 4°C in April to 5°C in January.
The mean monthly wind speed over the year (meters per second)
The best time of year to visit Belfast in Ireland
Other facts from our historical weather data:July has an average maximum temperature of 20°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 9°C.
August tops the wettest month list with 91 mm of rainfall.
March is the driest month with 69 mm of precipitation.
May is the sunniest month with an average of 184 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
