Wilmette Climate: Weather by Month and Best Time to Visit
Best months for Wilmette: September, July, August, June.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 0°C | -7°C | 58 mm | 9 | – | – | 3.9 |
| February | 1°C | -5°C | 52 mm | 7 | – | – | 4.3 |
| March | 7°C | -1°C | 66 mm | 10 | – | – | 5.1 |
| April | 13°C | 5°C | 107 mm | 12 | – | – | 5.9 |
| May | 19°C | 11°C | 104 mm | 12 | – | – | 6.9 |
| June | 25°C | 17°C | 93 mm | 12 | – | – | 7.5 |
| July | 28°C | 20°C | 86 mm | 11 | – | – | 7.6 |
| August | 27°C | 20°C | 92 mm | 11 | – | – | 7.6 |
| September | 23°C | 15°C | 74 mm | 9 | – | – | 7.9 |
| October | 16°C | 9°C | 82 mm | 10 | – | – | 6.9 |
| November | 9°C | 2°C | 67 mm | 9 | – | – | 5.8 |
| December | 3°C | -3°C | 59 mm | 9 | – | – | 4.4 |