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The climate of Belfast is oceanic, with quite cold, rainy winters and mild, relatively rainy summers.�The city is the capital of Northern Ireland and is located on the east coast.�

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Winter, from December to February, is quite cold: temperatures are not so low, but wind and humidity can increase the sensation of cold. The sky is often cloudy, and rainfall is frequent. Sometimes, intense Atlantic depressions can cause wind storms.�

Snowfalls are rare and not abundant. Usually, cold spells are not intense and do not last long. The temperature rarely drops below -5 °C, however, it can occasionally drop to lower values. At Aldergrove airport (located outside the city, near Lough Neagh), the coldest record is -15 °C and was set in December 2010.

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In spring, from March to May, the temperature slowly rises, and Atlantic fronts become a bit less frequent. In May, it is often still quite cold, especially in the first half of the month.

Summer, from June to August, is cool, with quite frequent rains.�Hot days are rare: the temperature may not reach 25 °C for an entire month, however, it can sometimes reach higher values. The highest record is 29.7 °C and was set in July 2021.�

Autumn, from September to November, is gray, cloudy and rainy, and with each passing week, it gets progressively colder. In November, the wind is often moderate or strong.

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In Belfast, the average temperature of the coldest month (January) is of 4.7 °C, that of the warmest month (July) is of 15.4 °C.

Here are the average temperatures

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In Belfast, precipitation amounts to 940 millimeters per year: so, it is at an intermediate level. It ranges from 65 mm in the driest months (February, April, May, July) to 95 mm in the wettest ones (October, November)

Here is the average precipitation

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At Belfast, the sea temperature ranges from 7 °C in February, March to 15 °C in August.

Here are the average sea temperatures

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In Belfast, there are on average around 1280 sunshine hours per year.

Here are the average hours of sunshine per day

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