Mattoon, IL Weather & Growing Conditions
Today
86°F
Mostly Sunny
Mostly sunny, with a high near 86. South wind 1 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Mostly Sunny | 1 to 5 mph S | 0% |
| Tonight | 65°F | Mostly Clear | 3 mph SSE | 0% |
| Wednesday | 86°F | Sunny | 6 mph S | 1% |
| Wednesday Night | 67°F | Partly Cloudy then Chance Showers And Thunderstorms | 6 mph S | 39% |
| Thursday | 83°F | Showers And Thunderstorms Likely | 3 to 7 mph SSW | 72% |
| Thursday Night | 66°F | Chance Showers And Thunderstorms | 1 to 5 mph S | 34% |
| Friday | 84°F | Slight Chance Showers And Thunderstorms | 5 mph SSW | 21% |
| Friday Night | 67°F | Slight Chance Showers And Thunderstorms | 3 mph SSW | 20% |
| Saturday | 86°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 6 mph SSW | 17% |
| Saturday Night | 69°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 6 mph SSW | 16% |
| Sunday | 88°F | Sunny | 7 to 10 mph SSW | 8% |
| Sunday Night | 71°F | Mostly Clear | 9 mph SSW | 9% |
| Monday | 89°F | Mostly Sunny | 10 mph SSW | 12% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms | 9 mph SSW | 24% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mattoon, IL
Last spring frost
Apr 11
First fall frost
Oct 29
Growing season
199 days
Hardiness zone
6a
Explore more for Mattoon, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Mattoon, Il (1.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.