Climate of Belfast
Belfast has a oceanic climate. There is rainfall during all months of the year. The average annual temperature for Belfast is 12° degrees and there is about 508 mm of rain in a year. It is dry for 105 days a year with an average humidity of 86% and an UV-index of 3.
Climate averages for the whole year
- Day: the average daily temperature during the day is between 7°C and 17°C
- Night:the average nighttime temperature is between 3°C and 11°C
- Sea temperature: the sea temperature is between 9°C and 15°C
- Rain: it rains 212 days and there is a total of approximately 508 mm rainfall
- Snow: it snows an average of 8 days per year
- Sun hours: throughout the year there are 1968 sun hours
Maximum temperature: | between 7°C and 17°C |
Warmest month: | 17°C in July |
Coldest month: | 7°C in January |
Night temperature: | between 3°C and 11°C |
Sea temperature: | between 9°C and 15°C |
Dry days: | 145 days |
Days with rain: | 212 days |
Days with snow: | 8 days |
Total rain sum: | 508 mm |
Hours of sunshine: | 1968 hours |
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Temperature graph
This graph shows the average maximum temperature (red) and minimum temperature (blue) for Belfast.
Precipitation graph
This graph shows the average amount of rainfall per month for Belfast.
Climate table of Belfast
In this climate table you can see at a glance what the average weather per month is for Belfast. The data has been collected over a 30-year period, from which an average per month has been derived. From year to year the differences may be larger or smaller, but with this climate table you have a good idea of what the weather for Belfast might be like in a given month.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Day temp. (°C) | 7 | 7 | 9 | 11 | 13 | 16 | 17 | 16 | 15 | 13 | 9 | 7 |
Night temp. (°C) | 3 | 3 | 3 | 5 | 7 | 10 | 11 | 11 | 10 | 9 | 6 | 4 |
Water temp. (°C) | 10 | 9 | 9 | 10 | 11 | 14 | 15 | 15 | 15 | 14 | 13 | 12 |
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
Precipitation (mm) | 42 | 38 | 44 | 30 | 33 | 42 | 44 | 49 | 34 | 48 | 56 | 48 |
Days with rain | 18 | 16 | 17 | 16 | 17 | 18 | 20 | 23 | 16 | 17 | 18 | 16 |
Days with snow | 3 | 2 | 1 | - | - | - | - | - | - | - | 1 | 1 |
Dry days | 10 | 10 | 13 | 14 | 14 | 12 | 11 | 8 | 14 | 14 | 11 | 14 |
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
Sun hours per day | 4 | 4 | 5 | 7 | 7 | 8 | 7 | 7 | 6 | 4 | 4 | 4 |
Wind force (Bft) | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 |
UV-index | 2 | 2 | 2 | 3 | 4 | 4 | 3 | 4 | 3 | 3 | 2 | 2 |
Best time to visit Belfast
The best time to visit Belfast in Northern Ireland is June. In this period you have a mild temperature and almost no precipitation. The highest average temperature in Belfast is 17°C in July and the lowest is 7°C in January. The water temperature is 15°C at its highest and in other months it can be 9°C.
Climate of Belfast by month
What is the average climate in a given month for Belfast? Click on a month to see all monthly averages for sunshine, maximum and minimum temperatures, percent chance of rain per day, snowfall and number of rainy days.
Belfast weather experiences
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