National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Fair

47°F

8°C

Humidity 54%
Wind Speed NW 3 mph
Barometer 30.17 in (1022.0 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 7 Nov 4:53 pm CST
Extended Forecast for

Janesville IL

  • Tonight

    Tonight: Mostly clear, with a low around 30. Calm wind becoming west southwest around 5 mph after midnight.

    Low: 30 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 61. West southwest wind 5 to 10 mph, with gusts as high as 17 mph.

    High: 61 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 35. West wind around 5 mph becoming calm in the evening.

    Low: 35 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 63. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 63 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 41. South southwest wind 3 to 5 mph.

    Low: 41 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 67. West wind 3 to 6 mph.

    High: 67 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 41. Calm wind.

    Low: 41 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: A 30 percent chance of rain after noon. Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 41.

    Low: 41 °F

    Chance Rain
    then Mostly
    Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 30. Calm wind becoming west southwest around 5 mph after midnight.
Sunday
Sunny, with a high near 61. West southwest wind 5 to 10 mph, with gusts as high as 17 mph.
Sunday Night
Mostly clear, with a low around 35. West wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 63. Calm wind becoming southwest around 6 mph in the afternoon.
Monday Night
Clear, with a low around 41. South southwest wind 3 to 5 mph.
Tuesday
Sunny, with a high near 67. West wind 3 to 6 mph.
Tuesday Night
Mostly clear, with a low around 41. Calm wind.
Veterans Day
A 30 percent chance of rain after noon. Mostly sunny, with a high near 64.
Wednesday Night
A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 41.
Thursday
Mostly sunny, with a high near 53.
Thursday Night
Partly cloudy, with a low around 32.
Friday
Mostly sunny, with a high near 49.
Friday Night
Mostly clear, with a low around 30.
Saturday
Sunny, with a high near 55.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Janesville IL
 39.35°N 88.25°W (Elev. 640 ft)
Last Update:
12:26 pm CST Nov 7, 2026
Forecast Valid:
5pm CST Nov 7, 2026-6pm CST Nov 14, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation