Mattoon, WI Weather & Growing Conditions
Overnight
52°F
Rain Showers Likely
Rain showers likely. Cloudy, with a low around 52. East wind around 8 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Rain Showers Likely | 8 mph E | 59% |
| Saturday | 61°F | Rain Showers Likely | 9 to 13 mph E | 69% |
| Saturday Night | 48°F | Rain Showers Likely then Mostly Cloudy | 6 to 9 mph NE | 65% |
| Sunday | 68°F | Partly Sunny | 8 to 13 mph NE | 3% |
| Sunday Night | 42°F | Mostly Cloudy | 12 mph NE | 0% |
| Monday | 61°F | Mostly Cloudy | 12 mph ENE | 1% |
| Monday Night | 39°F | Mostly Cloudy | 7 mph ENE | 2% |
| Tuesday | 62°F | Mostly Sunny | 6 to 10 mph ENE | 3% |
| Tuesday Night | 41°F | Partly Cloudy | 3 to 7 mph ENE | 3% |
| Wednesday | 65°F | Sunny | 3 to 8 mph ENE | 3% |
| Wednesday Night | 44°F | Patchy Fog | 1 to 5 mph ENE | 2% |
| Thursday | 69°F | Mostly Sunny | 1 to 5 mph E | 5% |
| Thursday Night | 46°F | Partly Cloudy | 2 mph W | 6% |
| Friday | 71°F | Mostly Sunny | 1 to 5 mph NNW | 6% |
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 (8.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.