Mattoon Weather Forecast
- 75
- 91
Mostly Sunny
- 75
- 93
Chance Thunderstorms
- 73
- 89
Chance Thunderstorms
- 72
- 87
Chance Thunderstorms
- 72
- 89
Mostly Sunny
- 72
- 91
Mostly Sunny
Today 23 Jul Coles
Mostly sunny. Humid with Highs in the lower 90s. South Winds 5 to 10 Mph. Heat index Values up to 105 in the afternoon.
Tonight 23 Jul Coles
Mostly clear. Near steady temperature in the lower 70s. Southeast Winds around 5 Mph.
Mattoon Temperature Statistics
July Temperature
Mattoon / Charleston, Coles County Memorial Airport (5 miles)
Lowest 8 July, 2025
64.7 °FAverage July
77.8 °FHighest 6 July, 2025
90.6 °F
Climate (2020–Present)
Mattoon / Charleston, Coles County Memorial Airport (5 miles)
Average Low 2020–2025
45.7 °FAverage 2020–2025
55 °FAverage High 2020–2025
64.4 °F