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The best time to visit Belfast

Month-by-month climate averages for Belfast, Northern Ireland, so you can pick your dates on data rather than guesswork.

Short answer

The most comfortable time to visit Belfast is usually May, June, August and September, when daytime highs sit in the pleasant 16-26°C range and the heaviest July rain is behind you.

Belfast is warmest in June (highs near 18°C) and coldest in January (lows around 3°C), with roughly 1125 mm of precipitation across the year and July the wettest month. The sweet spot for most visitors is May, June, August and September.

These are long-run averages. For the actual days you are travelling, check the live Belfast forecast — and note how much the models agree, because that tells you how much to trust it.

Belfast weather by month

what to expect in Belfast through the year

Here is Belfast's typical weather in each month: the average daytime high and overnight low in °C, how each month feels, and the wettest month marked. Use it to plan any trip to Belfast by season.

Jan
7°
3°
Cold
Feb
9°
4°
Cool
Mar
9°
4°
Cool
Apr
11°
5°
Cool
May
16°
9°
Mild
Jun
18°
11°
Mild
Jul
17°
11°
Mild
Wettest
Aug
18°
12°
Mild
Sep
17°
10°
Mild
Oct
14°
9°
Cool
Nov
10°
5°
Cool
Dec
9°
5°
Cool

Common questions

When is the best time to visit Belfast?
The most comfortable time to visit Belfast is usually May, June, August and September, when daytime highs sit in the pleasant 16-26°C range and the heaviest July rain is behind you.
What is the warmest month in Belfast?
June is the warmest month in Belfast, averaging highs near 18°C.
What is the coldest month in Belfast?
January is the coldest month in Belfast, with lows around 3°C.
When is the rainy season in Belfast?
The wettest month in Belfast is usually July, out of roughly 1125 mm of precipitation across the year.

Belfast month by month

JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember