Mattoon, WI Weather & Growing Conditions
Overnight
57°F
Rain Showers Likely
Rain showers likely and areas of fog before 2am, then widespread fog and rain showers likely between 2am and 3am, then rain showers and areas of fog. Cloudy. Low around 57, with temperatures rising to around 59 overnight. South southeast wind around 9 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Rain Showers Likely | 9 mph SSE | 95% |
| Wednesday | 62°F | Rain Showers | 8 to 12 mph S | 79% |
| Wednesday Night | 45°F | Rain Showers | 5 to 10 mph SW | 88% |
| Thursday | 50°F | Rain Showers | 6 to 15 mph NW | 90% |
| Thursday Night | 33°F | Chance Rain Showers then Mostly Cloudy | 13 to 16 mph N | 27% |
| Friday | 45°F | Partly Sunny | 6 to 13 mph N | 4% |
| Friday Night | 26°F | Partly Cloudy | 0 to 3 mph N | 2% |
| Saturday | 47°F | Mostly Sunny | 0 to 5 mph W | 0% |
| Saturday Night | 30°F | Partly Cloudy | 5 mph W | 11% |
| Sunday | 53°F | Mostly Sunny | 5 to 10 mph WNW | 10% |
| Sunday Night | 32°F | Partly Cloudy | 3 to 8 mph W | 3% |
| Monday | 54°F | Mostly Sunny | 3 to 12 mph WSW | 1% |
| Monday Night | 36°F | Partly Cloudy | 7 to 10 mph WNW | 0% |
| Tuesday | 53°F | Sunny | 10 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mattoon, WI
Last spring frost
May 14
First fall frost
Sep 30
Growing season
139 days
Hardiness zone
4b
Explore more for Mattoon, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Antigo, Wi (11.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.