Casey Weather Forecast
- 75
- 91
Mostly Sunny
- 75
- 92
Mostly Sunny
- 73
- 89
Chance Thunderstorms
- 74
- 90
Chance Thunderstorms
- 74
- 91
Slight Chance Thunderstorms
- 75
- 91
Mostly Sunny
Today 23 Jul Clark
Sunny. Highs in the lower 90s. South Winds 5 to 10 Mph. Heat index Values up to 103 this afternoon.
Tonight 23 Jul Clark
Mostly clear. Humid with Lows in the mid 70s. South Winds around 5 Mph.
Casey Temperature Statistics
July Temperature
Mattoon / Charleston, Coles County Memorial Airport (19.3 miles)
Lowest 8 July, 2025
64.7 °FAverage July
77.9 °FHighest 6 July, 2025
90.6 °F
Climate (2020–Present)
Mattoon / Charleston, Coles County Memorial Airport (19.3 miles)
Average Low 2020–2025
45.7 °FAverage 2020–2025
55 °FAverage High 2020–2025
64.4 °F