Mattoon, WI Weather Forecast
Local 7-day forecast
Partly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Mattoon, WI in one place.
Partly sunny, with a high near 86. Heat index values as high as 88. Southwest wind around 3 mph.
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: Jun 7, 2026 10:03 PM CDT.
The active forecast window currently covers Jun 9 to Jun 14, 2026 for Mattoon, WI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 9 to Jun 14, 2026
- Latest sync
- Jun 7, 2026 10:03 PM CDT
- Forecast office
- GRB
- Source
- NOAA / NWS
Daily Outlook
This Week in Mattoon
Wednesday looks like the warmest upcoming period in Mattoon at 90 degrees F.
Saturday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Wednesday at about 6 to 14 mph S.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 7, 2026 10:03 PM 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 between 1am and 4am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 64. South southeast wind around 5 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 7am, then showers and thunderstorms likely. Partly sunny, with a high near 90. Chance of precipitation is 60%.
Showers and thunderstorms likely before 7pm, then showers and thunderstorms. Partly cloudy, with a low around 65. Chance of precipitation is 80%.
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 82. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 56. Chance of precipitation is 50%.
A slight chance of rain showers before 7am. Sunny, with a high near 80. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms after 7pm. Mostly clear, with a low around 58. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 81. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 54. Chance of precipitation is 20%.
A slight chance of rain showers. Mostly sunny, with a high near 74. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jun 9
|
Partly Sunny
|
86°F |
3 mph
SW
|
|
Tuesday Night
Jun 9
|
Partly Cloudy then Chance Showers And Thunderstorms
|
64°F |
5 mph
SSE
|
|
Wednesday
Jun 10
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
90°F |
6 to 14 mph
S
|
|
Wednesday Night
Jun 10
|
Showers And Thunderstorms Likely then Showers And Thunderstorms
|
65°F |
10 to 14 mph
SW
|
|
Thursday
Jun 11
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
82°F |
9 to 14 mph
WSW
|
|
Thursday Night
Jun 11
|
Chance Showers And Thunderstorms
|
56°F |
9 to 14 mph
W
|
|
Friday
Jun 12
|
Slight Chance Rain Showers then Sunny
|
80°F |
8 to 14 mph
W
|
|
Friday Night
Jun 12
|
Slight Chance Showers And Thunderstorms
|
58°F |
5 to 12 mph
WSW
|
|
Saturday
Jun 13
|
Slight Chance Showers And Thunderstorms
|
81°F |
5 to 10 mph
WSW
|
|
Saturday Night
Jun 13
|
Slight Chance Showers And Thunderstorms
|
54°F |
5 to 9 mph
WNW
|
|
Sunday
Jun 14
|
Slight Chance Rain Showers
|
74°F |
8 mph
NW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Mattoon.