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.

Fog/Mist

20°F

-7°C

Humidity 85%
Wind Speed NW 8 mph
Barometer 30.07 in (1019.4 mb)
Dewpoint 16°F (-9°C)
Visibility 4.00 mi
Wind Chill10°F (-12°C)
Last update 2 Dec 12:53 pm CST
Extended Forecast for

Janesville IL

  • This Afternoon

    This Afternoon: Scattered flurries before 5pm. Cloudy, with a high near 22. West northwest wind 3 to 8 mph.

    High: 22 °F

    Scattered
    Flurries

  • Tonight

    Tonight: Areas of fog after 9pm. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 16. South wind 3 to 8 mph.

    Low: 16 °F

    Areas Fog

  • Wednesday

    Wednesday: Patchy fog before 9am. Otherwise, increasing clouds, with a high near 35. South wind 7 to 10 mph becoming west in the afternoon. Winds could gust as high as 16 mph.

    High: 35 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 10. Wind chill values between -1 and 4. West wind 6 to 11 mph becoming north after midnight. Winds could gust as high as 18 mph.

    Low: 10 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 18. North wind 5 to 10 mph becoming light in the afternoon. Winds could gust as high as 16 mph.

    High: 18 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 4. Light and variable wind.

    Low: 4 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 30. South southwest wind 3 to 6 mph.

    High: 30 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 17.

    Low: 17 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 31.

    High: 31 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Scattered flurries before 5pm. Cloudy, with a high near 22. West northwest wind 3 to 8 mph.
Tonight
Areas of fog after 9pm. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 16. South wind 3 to 8 mph.
Wednesday
Patchy fog before 9am. Otherwise, increasing clouds, with a high near 35. South wind 7 to 10 mph becoming west in the afternoon. Winds could gust as high as 16 mph.
Wednesday Night
Mostly cloudy, with a low around 10. Wind chill values between -1 and 4. West wind 6 to 11 mph becoming north after midnight. Winds could gust as high as 18 mph.
Thursday
Sunny, with a high near 18. North wind 5 to 10 mph becoming light in the afternoon. Winds could gust as high as 16 mph.
Thursday Night
Partly cloudy, with a low around 4. Light and variable wind.
Friday
Mostly sunny, with a high near 30. South southwest wind 3 to 6 mph.
Friday Night
Mostly cloudy, with a low around 17.
Saturday
Partly sunny, with a high near 31.
Saturday Night
Mostly cloudy, with a low around 20.
Sunday
Mostly cloudy, with a high near 31.
Sunday Night
Mostly cloudy, with a low around 13.
Monday
Partly sunny, with a high near 28.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Janesville IL
 39.37°N 88.25°W (Elev. 669 ft)
Last Update:
1:31 pm CST Dec 2, 2025
Forecast Valid:
1pm CST Dec 2, 2025-6pm CST Dec 8, 2025
 
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Additional Resources

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