Climate in Haarlem: average temperature by month
In Haarlem the warmest month is August, with 22.0 °C on average in the afternoon; the coolest is January, with 6.0 °C.
The average of the weather stations De Bilt (48 km), Den Helder (62 km) and West Souburg (126 km); nearer ones count more.
| Month | Average high | Coolest to warmest day |
|---|---|---|
| January | 6.0 °C | 5.7 °C – 6.5 °C |
| February | 6.9 °C | 6.1 °C – 8.1 °C |
| March | 9.9 °C | 8.2 °C – 11.6 °C |
| April | 13.4 °C | 11.8 °C – 15.0 °C |
| May | 17.4 °C | 15.2 °C – 19.0 °C |
| June | 20.3 °C | 19.1 °C – 21.4 °C |
| July | 21.9 °C | 21.3 °C – 22.6 °C |
| August | 22.0 °C | 21.1 °C – 22.5 °C |
| September | 19.2 °C | 16.9 °C – 21.0 °C |
| October | 14.9 °C | 12.7 °C – 16.8 °C |
| November | 9.9 °C | 7.8 °C – 12.5 °C |
| December | 7.1 °C | 6.6 °C – 7.7 °C |