Belfast, Northern Ireland, United Kingdom climate
Average temperatures, precipitation and all-time records for Belfast, Northern Ireland, United Kingdom, with every day graded against ~46 years of local climate history (1980–2026). Its warmest month is July, averaging a high of 18°C, and its coldest is January, with an average low of 3°C.
Belfast is the capital city and main port of Northern Ireland, standing on the banks of the River Lagan and connected to the open sea through Belfast Lough and the North Channel. via Wikipedia
How today compares
Latest recorded day: 2026-07-24. Each reading placed on Belfast, Northern Ireland, United Kingdom's own ±7-day seasonal distribution.
Belfast average temperatures by month
Typical daily high and low, and average precipitation, for each month in Belfast, Northern Ireland, United Kingdom, based on 1980–2026 records. The wettest month is January (3 mm on an average day).
| Month | Avg high | Avg low | Avg precip |
|---|---|---|---|
| January | 7°C | 3°C | 3 mm |
| February | 8°C | 4°C | 3 mm |
| March | 9°C | 4°C | 3 mm |
| April | 11°C | 5°C | 3 mm |
| May | 14°C | 8°C | 3 mm |
| June | 16°C | 10°C | 3 mm |
| July | 18°C | 12°C | 3 mm |
| August | 18°C | 12°C | 3 mm |
| September | 16°C | 11°C | 3 mm |
| October | 13°C | 8°C | 3 mm |
| November | 10°C | 6°C | 3 mm |
| December | 8°C | 4°C | 3 mm |
Each bar spans the 10th-percentile daily low to the 90th-percentile daily high (the range most days fall within), coloured cold → hot on a shared -23°C to 46°C scale, so the whole year's rhythm reads at a glance.
Thinking of visiting Belfast?
Trips live and die by the weather. See how Belfast's comfort stacks up against where you live. Belfast is pre-loaded, just add your city.
Record extremes
- Hottest day on record: 26°C on 2018-06-28
- Coldest day on record: -10°C on 2010-12-25
Percentiles compare each day to Belfast, Northern Ireland, United Kingdom's own history, so grades are relative to this location: a “Near Record” day here isn't the same temperature as elsewhere. How the grades work →