United Kingdom
Weather in Harrow through the year
The average of the weather stations Oxford (68 km), Abbeville (221 km) and Pte De La Hague (235 km); nearer ones count more.
| Month | Average high | Coolest to warmest day |
|---|---|---|
| January | 7.8 °C | 7.6 °C – 8.2 °C |
| February | 8.8 °C | 8.2 °C – 9.4 °C |
| March | 11.3 °C | 9.4 °C – 12.8 °C |
| April | 14.3 °C | 12.9 °C – 15.6 °C |
| May | 17.7 °C | 15.8 °C – 19.2 °C |
| June | 20.8 °C | 19.2 °C – 22.1 °C |
| July | 22.9 °C | 22.1 °C – 23.3 °C |
| August | 22.3 °C | 21.1 °C – 23.0 °C |
| September | 19.3 °C | 17.3 °C – 21.0 °C |
| October | 15.1 °C | 13.0 °C – 17.1 °C |
| November | 10.8 °C | 9.1 °C – 12.8 °C |
| December | 8.6 °C | 8.0 °C – 9.0 °C |