Belfast
United Kingdom
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Belfast, United Kingdom

A close-up view of the Northern Ireland City Hall located in Belfast, United Kingdom
A close-up view of the Northern Ireland City Hall located in Belfast, United Kingdom
January, like December, is a frosty winter month in Belfast, United Kingdom, with temperature in the range of an average high of 7.1°C (44.8°F) and an average low of 1.7°C (35.1°F). With an average high-temperature of 7.1°C (44.8°F) and an average low-temperature of 1.7°C (35.1°F), January is the coldest month. Weather in January »
February, the last month of the winter, in Belfast, is also a frosty month, with average temperature fluctuating between 7.5°C (45.5°F) and 1.6°C (34.9°F). In Belfast, the average high-temperature is almost the same as in January - a still frosty 7.5°C (45.5°F). Weather in February »

March, the first month of the spring, in Belfast, is also a frosty month, with average temperature ranging between max 9.5°C (49.1°F) and min 2.9°C (37.2°F). In Belfast, the average high-temperature in March is essentially the same as in February - a still frosty 9.5°C (49.1°F). Weather in March »

April is a cool spring month in Belfast, United Kingdom, with temperature in the range of an average high of 11.9°C (53.4°F) and an average low of 4.3°C (39.7°F). In April, the average high-temperature is relatively the same as in March - a fresh 11.9°C (53.4°F). Weather in April »

May, the last month of the spring, in Belfast, is a mild month, with temperature in the range of an average low of 6.8°C (44.2°F) and an average high of 15°C (59°F). In Belfast, the average high-temperature in May slightly increases, from a cool 11.9°C (53.4°F) in April, to a mild 15°C (59°F). Weather in May »

June, the first month of the summer, in Belfast, is an enjoyable month, with average temperature varying between 9.8°C (49.6°F) and 17.4°C (63.3°F). In June, the average high-temperature is practically the same as in May - a comfortable 17.4°C (63.3°F). Weather in June »

July, like June, in Belfast, United Kingdom, is another comfortable summer month, with average temperature ranging between max 18.8°C (65.8°F) and min 11.7°C (53.1°F). July is the warmest month, with an average high-temperature of 18.8°C (65.8°F) and an average low-temperature of 11.7°C (53.1°F). Weather in July »

The last month of the summer, August, is also an enjoyable month in Belfast, United Kingdom, with average temperature varying between 11.4°C (52.5°F) and 18.3°C (64.9°F). In Belfast, United Kingdom, the average high-temperature is relatively the same as in July - a still enjoyable 18.3°C (64.9°F). Weather in August »

The first month of the autumn, September, is also an enjoyable month in Belfast, United Kingdom, with average temperature ranging between min 9.5°C (49.1°F) and max 16.4°C (61.5°F). In September, the average high-temperature is almost the same as in August - a still enjoyable 16.4°C (61.5°F). Weather in September »

October, like September, in Belfast, United Kingdom, is a cool autumn month, with average temperature varying between 12.9°C (55.2°F) and 6.9°C (44.4°F). In Belfast, United Kingdom, the average high-temperature marginally drops, from an enjoyable 16.4°C (61.5°F) in September, to a fresh 12.9°C (55.2°F). Weather in October »

The last month of the autumn, November, is another chilly month in Belfast, United Kingdom, with average temperature varying between 9.5°C (49.1°F) and 4°C (39.2°F). In November, the average high-temperature slightly decreases, from a cool 12.9°C (55.2°F) in October, to a chilly 9.5°C (49.1°F). Weather in November »

December, the first month of the winter, in Belfast, is still a chilly month, with average temperature varying between 7.4°C (45.3°F) and 2.1°C (35.8°F). In December, the average high-temperature is essentially the same as in November - a still frosty 7.4°C (45.3°F). Weather in December »

What is the coldest month in Belfast?

The coldest month in Belfast, United Kingdom, is January, with an average high-temperature of 7.1°C (44.8°F) and an average low-temperature of 1.7°C (35.1°F).

How many days does it rain in Belfast?

Throughout the year, there are 157.5 rainfall days, and 860.2mm (33.9") of precipitation is accumulated.

When is the lowest UV index in Belfast?

Months with the lowest UV index are January and December, with an average maximum UV index of 0.

What month is the sea coldest in Belfast?

With an average sea temperature of 8°C (46.4°F), March is the month with the coldest seawater in Belfast.

What is the driest month in Belfast?

The month with the least rainfall in Belfast, United Kingdom, is May when the rain falls for 11.7 days and typically collects 57.3mm (2.3") of precipitation.

What month has the most sunshine in Belfast?

With an average of 6.4h of sunshine, May has the most sunshine of the year in Belfast.

When are the longest days in Belfast?

With an average of 17.2h of daylight, June has the longest days of the year in Belfast, United Kingdom.

What is the month with the highest UV index in Belfast?

Months with the highest UV index in Belfast are June and July, with an average maximum UV index of 6.

What is the warmest month in Belfast?

July is the warmest month, with an average high-temperature of 18.8°C (65.8°F) and an average low-temperature of 11.7°C (53.1°F).

What month is the sea warmest in Belfast?

September is the month with the warmest seawater, with an average sea temperature of 14.3°C (57.7°F).

What is the wettest month in Belfast?

October is the month with the most rainfall. Rain falls for 14.4 days and accumulates 89.6mm (3.5") of precipitation.

What is the month with the shortest days in Belfast?

With an average of 7.4h of daylight, December has the shortest days of the year in Belfast.

What is the month with the least sunshine in Belfast?

December has the least sunshine of the year in Belfast, United Kingdom, with an average of 1.5h of sunshine.
Average rainfall - Belfast, United Kingdom

The wettest month (with the highest rainfall) is October (89.6mm).
The driest month (with the lowest rainfall) is May (57.3mm).

Average rainfall days - Belfast, United Kingdom

The month with the highest number of rainy days is January (14.8 days).
The month with the lowest number of rainy days is June (11.3 days).

Average sea temperature - Belfast, United Kingdom

The best month for swimming (with the highest average sea temperature) is September (14.3°C).
The coldest month (with the lowest average sea temperature) is March (8°C).

Average daylight / Average sunshine - Belfast, United Kingdom