Climate in Belfast: average temperature by month
In Belfast the warmest month is July, with 19.5 °C on average in the afternoon; the coolest is January, with 7.9 °C.
The average of the weather stations Armagh (54 km), Malin Head (125 km) and Dublin Phoenix Park (139 km); nearer ones count more.
| Month | Average high | Coolest to warmest day |
|---|---|---|
| January | 7.9 °C | 7.6 °C – 8.3 °C |
| February | 8.6 °C | 8.1 °C – 9.1 °C |
| March | 10.4 °C | 9.0 °C – 11.6 °C |
| April | 12.8 °C | 11.6 °C – 14.2 °C |
| May | 15.9 °C | 14.3 °C – 17.3 °C |
| June | 18.2 °C | 17.4 °C – 18.9 °C |
| July | 19.5 °C | 18.9 °C – 20.0 °C |
| August | 19.1 °C | 18.5 °C – 19.6 °C |
| September | 17.0 °C | 15.5 °C – 18.4 °C |
| October | 13.7 °C | 12.1 °C – 15.4 °C |
| November | 10.3 °C | 8.9 °C – 12.0 °C |
| December | 8.4 °C | 7.9 °C – 8.8 °C |