Mattoon, IL Weather & Growing Conditions
Tonight
57°F
Rain
Rain before 3am, then a chance of rain showers. Mostly cloudy, with a low around 57. South wind 14 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Rain | 14 to 18 mph S | 94% |
| Wednesday | 63°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 14 mph SW | 21% |
| Wednesday Night | 45°F | Mostly Cloudy | 8 mph SW | 0% |
| Thursday | 63°F | Sunny | 7 to 12 mph WSW | 1% |
| Thursday Night | 44°F | Mostly Cloudy | 5 mph WNW | 5% |
| Friday | 57°F | Partly Sunny | 6 to 10 mph NNW | 11% |
| Friday Night | 38°F | Partly Cloudy | 3 to 7 mph NNW | 6% |
| Saturday | 55°F | Mostly Sunny | 6 mph NW | 1% |
| Saturday Night | 34°F | Partly Cloudy | 2 mph W | 2% |
| Sunday | 60°F | Sunny | 2 to 8 mph W | 9% |
| Sunday Night | 35°F | Mostly Clear | 5 mph WNW | 6% |
| Monday | 64°F | Sunny | 3 to 10 mph WSW | 3% |
| Monday Night | 39°F | Mostly Clear | 6 mph WSW | 1% |
| Tuesday | 67°F | Sunny | 7 mph W | 1% |
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 Nov 4, 2026.