Mattoon, WI Weather Forecast
Local 7-day forecast
Slight Chance Rain Showers then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Mattoon, WI in one place.
A slight chance of rain showers before 7am, then a chance of showers and thunderstorms. Partly sunny. High near 79, with temperatures falling to around 77 in the afternoon. Heat index values as high as 78. North northeast wind 5 to 8 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Mattoon, WI is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jul 31, 2026 8:27 AM CDT.
The active forecast window currently covers Aug 1 to Aug 6, 2026 for Mattoon, WI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 1 to Aug 6, 2026
- Latest sync
- Jul 31, 2026 8:27 AM CDT
- Forecast office
- GRB
- Source
- NOAA / NWS
Daily Outlook
This Week in Mattoon
Tuesday looks like the warmest upcoming period in Mattoon at 84 degrees F.
Sunday Night is the coolest period ahead with temperatures near 51 degrees F.
The strongest winds are forecast for Tuesday at about 2 to 9 mph SW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 31, 2026 8:27 AM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- GRB
- Radar station
- KGRB
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 56. North northeast wind around 8 mph. Chance of precipitation is 50%.
Mostly sunny, with a high near 79. Northeast wind around 8 mph.
Mostly clear, with a low around 51.
Sunny, with a high near 82.
Mostly clear, with a low around 58.
Mostly sunny, with a high near 84.
A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 60. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Partly sunny, with a high near 78. Chance of precipitation is 50%.
A slight chance of rain showers. Mostly cloudy, with a low around 56. Chance of precipitation is 20%.
A slight chance of rain showers before 7am. Mostly sunny, with a high near 81. Chance of precipitation is 20%.
Partly cloudy, with a low around 59.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Aug 1
|
Slight Chance Rain Showers then Chance Showers And Thunderstorms
|
79°F |
5 to 8 mph
NNE
|
|
Saturday Night
Aug 1
|
Chance Showers And Thunderstorms then Partly Cloudy
|
56°F |
8 mph
NNE
|
|
Sunday
Aug 2
|
Mostly Sunny
|
79°F |
8 mph
NE
|
|
Sunday Night
Aug 2
|
Mostly Clear
|
51°F |
0 to 5 mph
E
|
|
Monday
Aug 3
|
Sunny
|
82°F |
1 to 5 mph
SE
|
|
Monday Night
Aug 3
|
Mostly Clear
|
58°F |
5 mph
SSW
|
|
Tuesday
Aug 4
|
Mostly Sunny
|
84°F |
2 to 9 mph
SW
|
|
Tuesday Night
Aug 4
|
Chance Showers And Thunderstorms
|
60°F |
3 to 8 mph
W
|
|
Wednesday
Aug 5
|
Chance Showers And Thunderstorms
|
78°F |
6 mph
WNW
|
|
Wednesday Night
Aug 5
|
Slight Chance Rain Showers
|
56°F |
1 to 6 mph
NNW
|
|
Thursday
Aug 6
|
Slight Chance Rain Showers then Mostly Sunny
|
81°F |
1 to 5 mph
NW
|
|
Thursday Night
Aug 6
|
Partly Cloudy
|
59°F |
3 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Mattoon.