Mattoon Climate: Weather by Month and Best Time to Visit
Best months for Mattoon: September, August, October.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 3°C | -5°C | 75 mm | 9 | – | – | 4.4 |
| February | 6°C | -3°C | 64 mm | 8 | – | – | 5.0 |
| March | 12°C | 2°C | 87 mm | 11 | – | – | 5.9 |
| April | 19°C | 8°C | 120 mm | 12 | – | – | 6.8 |
| May | 24°C | 14°C | 118 mm | 13 | – | – | 7.1 |
| June | 28°C | 19°C | 109 mm | 11 | – | – | 7.4 |
| July | 30°C | 20°C | 95 mm | 11 | – | – | 7.4 |
| August | 29°C | 19°C | 76 mm | 9 | – | – | 7.9 |
| September | 26°C | 15°C | 75 mm | 7 | – | – | 8.1 |
| October | 19°C | 9°C | 83 mm | 8 | – | – | 7.6 |
| November | 12°C | 2°C | 88 mm | 8 | – | – | 6.2 |
| December | 5°C | -2°C | 68 mm | 9 | – | – | 4.9 |