Monthly weather forecast and climate
Belfast, United Kingdom

The Northern Ireland City Hall located in Belfast, United Kingdom
The Northern Ireland City Hall located in Belfast, United Kingdom
January, like December, is a frosty winter month in Belfast, United Kingdom, with average temperature fluctuating between 3.1°C (37.6°F) and 6.8°C (44.2°F). January is the coldest month, with an average high-temperature of 6.8°C (44.2°F) and an average low-temperature of 3.1°C (37.6°F). Weather in January »

The last month of the winter, February, is also a frosty month in Belfast, United Kingdom, with average temperature fluctuating between 7.1°C (44.8°F) and 2.8°C (37°F). In February, the average high-temperature is almost the same as in January - a still chilly 7.1°C (44.8°F). Weather in February »

The first month of the spring, March, is also a frosty month in Belfast, United Kingdom, with average temperature ranging between max 8.5°C (47.3°F) and min 3.2°C (37.8°F). In March, the average high-temperature is relatively the same as in February - a still frosty 8.5°C (47.3°F). Weather in March »

April in Belfast, United Kingdom, is a cool spring month, with average temperature fluctuating between 10.8°C (51.4°F) and 4.9°C (40.8°F). In April, the average high-temperature is almost the same as in March - a cool 10.8°C (51.4°F). Weather in April »

The last month of the spring, May, is a moderate month in Belfast, United Kingdom, with average temperature fluctuating between 13.3°C (55.9°F) and 7.1°C (44.8°F). In May, the average high-temperature is almost the same as in April - a moderate 13.3°C (55.9°F). Weather in May »

June, the first month of the summer, in Belfast, is still a mild month, with average temperature fluctuating between 15.8°C (60.4°F) and 9.5°C (49.1°F). In Belfast, the average high-temperature is essentially the same as in May - a still moderate 15.8°C (60.4°F). Weather in June »

July is a comfortable summer month in Belfast, United Kingdom, with temperature in the range of an average high of 16.9°C (62.4°F) and an average low of 11.2°C (52.2°F). The warmest month is July, with an average high-temperature of 16.9°C (62.4°F) and an average low-temperature of 11.2°C (52.2°F). Weather in July »

August, the last month of the summer, in Belfast, is another comfortable month, with average temperature ranging between min 11.3°C (52.3°F) and max 16.7°C (62.1°F). In Belfast, the average high-temperature in August is almost the same as in July - a still comfortable 16.7°C (62.1°F). Weather in August »

September, the first month of the autumn, in Belfast, is also a moderate month, with temperature in the range of an average high of 14.8°C (58.6°F) and an average low of 10.1°C (50.2°F). In September, the average high-temperature is essentially the same as in August - a moderate 14.8°C (58.6°F). Weather in September »

October, the same as September, is another fresh autumn month in Belfast, United Kingdom, with average temperature varying between 8.2°C (46.8°F) and 12.4°C (54.3°F). In Belfast, the average high-temperature in October is relatively the same as in September - a cool 12.4°C (54.3°F). Weather in October »

November, the last month of the autumn, in Belfast, is also a frosty month, with average temperature fluctuating between 5.6°C (42.1°F) and 9°C (48.2°F). In November, the average high-temperature marginally drops, from a cool 12.4°C (54.3°F) in October, to a chilly 9°C (48.2°F). Weather in November »

December, the first month of the winter, in Belfast, is also a frosty month, with average temperature ranging between max 7.3°C (45.1°F) and min 3.9°C (39°F). In Belfast, the average high-temperature is practically the same as in November - a still chilly 7.3°C (45.1°F). Weather in December »

What is the coldest month in Belfast?

With an average high-temperature of 6.8°C (44.2°F) and an average low-temperature of 3.1°C (37.6°F), January is the coldest month in Belfast.

What is the most humid month in Belfast?

January and December, with an average relative humidity of 88%, are most humid months.

How many days does it rain in Belfast?

In Belfast, United Kingdom, during the entire year, the rain falls for 220.2 days and collects up to 626mm (24.65") of precipitation.

When does it snow in Belfast?

January through March, November and December are months with snowfall in Belfast, United Kingdom.

How much does it snow in Belfast?

Throughout the year, in Belfast, there are 8.2 snowfall days, and 47mm (1.85") of snow is accumulated.

What are the months with the lowest UV index in Belfast?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Belfast, United Kingdom.

What is the snowiest month in Belfast?

February is the month with the most snowfall in Belfast. Snow falls for 2.8 days and accumulates 25mm (0.98") of snow.

What is the month with the least sunshine in Belfast?

February has the least sunshine of the year in Belfast, with an average of 3.5h of sunshine.

What month is the sea coldest in Belfast?

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

What is the least humid month in Belfast?

April and May, with an average relative humidity of 83%, are the least humid months.

When it does not snow in Belfast?

In Belfast snow does not fall in April through October.

What is the driest month in Belfast?

The month with the least rainfall in Belfast is May when the rain falls for 17.8 days and typically collects 38mm (1.5") of precipitation.

What are the months with the highest UV index in Belfast?

Months with the highest UV index in Belfast, United Kingdom, are May through August, with an average maximum UV index of 4.

When are the longest days in Belfast?

The month with the longest days in Belfast is June, with an average of 17.2h of daylight.

What month has the most sunshine in Belfast?

June has the most sunshine of the year in Belfast, United Kingdom, with an average of 7.3h of sunshine.

What is the warmest month in Belfast?

The warmest month is July, with an average high-temperature of 16.9°C (62.4°F) and an average low-temperature of 11.2°C (52.2°F).

What is the rainiest month in Belfast?

August is the month with the most rainfall. Rain falls for 23 days and accumulates 72mm (2.83") of precipitation.

What month is the sea warmest in Belfast?

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

What is the month with the shortest days in Belfast?

The month with the shortest days is December, with an average of 7.4h of daylight.
Average temperature - Belfast, United Kingdom
Average humidity - Belfast, United Kingdom
Average rainfall - Belfast, United Kingdom
Average rainfall days - Belfast, United Kingdom

The month with the highest number of rainy days is August (23 days).
The month with the least rainy days is April (16.1 days).

Average snowfall - Belfast, United Kingdom

The month with the highest snowfall is February (25mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days - Belfast, United Kingdom

The month with the highest number of snowfall days is February (2.8 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 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

The month with the longest days is June (Average daylight: 17.2h).
The month with the shortest days is December (Average daylight: 7.4h).

The month with the most sunshine is June (Average sunshine: 7.3h).
The month with the least sunshine is February (Average sunshine: 3.5h).

Average UV index - Belfast, United Kingdom

Months with the highest UV index are May, June, July and August (UV index 4).
Months with the lowest UV index are January, February, March, November and December (UV index 2).