Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Overcast

22°F

-6°C

Humidity 82%
Wind Speed W 14 mph
Barometer 30.41 in (1030.8 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill9°F (-13°C)
Last update 30 Nov 4:53 pm CST
Extended Forecast for

Janesville IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 17. West northwest wind 5 to 9 mph becoming calm  in the evening.

    Low: 17 °F

    Mostly Cloudy

  • Monday

    Monday: A 40 percent chance of snow after 3pm.  Cloudy, with a high near 31. Calm wind becoming east southeast around 6 mph.

    High: 31 °F

    Cloudy then
    Chance Snow

  • Monday Night

    Monday Night: Snow, mainly before 3am.  Low around 19. Calm wind becoming northwest around 6 mph after midnight.  Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    Low: 19 °F

    Snow then
    Snow Likely

  • Tuesday

    Tuesday: Partly sunny, with a high near 25. Northwest wind 3 to 6 mph.

    High: 25 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 15. Calm wind becoming south 5 to 7 mph after midnight.

    Low: 15 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 34. South wind 7 to 10 mph, with gusts as high as 17 mph.

    High: 34 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 11. West southwest wind 6 to 11 mph becoming north northwest after midnight. Winds could gust as high as 17 mph.

    Low: 11 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 18.

    High: 18 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 4.

    Low: 4 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 17. West northwest wind 5 to 9 mph becoming calm in the evening.
Monday
A 40 percent chance of snow after 3pm. Cloudy, with a high near 31. Calm wind becoming east southeast around 6 mph.
Monday Night
Snow, mainly before 3am. Low around 19. Calm wind becoming northwest around 6 mph after midnight. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Tuesday
Partly sunny, with a high near 25. Northwest wind 3 to 6 mph.
Tuesday Night
Partly cloudy, with a low around 15. Calm wind becoming south 5 to 7 mph after midnight.
Wednesday
Partly sunny, with a high near 34. South wind 7 to 10 mph, with gusts as high as 17 mph.
Wednesday Night
Mostly cloudy, with a low around 11. West southwest wind 6 to 11 mph becoming north northwest after midnight. Winds could gust as high as 17 mph.
Thursday
Mostly sunny, with a high near 18.
Thursday Night
Mostly cloudy, with a low around 4.
Friday
A 40 percent chance of snow. Mostly cloudy, with a high near 28.
Friday Night
A chance of snow. Mostly cloudy, with a low around 20.
Saturday
Mostly cloudy, with a high near 31.
Saturday Night
Mostly cloudy, with a low around 22.
Sunday
Mostly cloudy, with a high near 32.
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ABOUT THIS FORECAST

 
Point Forecast:
Janesville IL
 39.37°N 88.25°W (Elev. 669 ft)
3:16 pm CST Nov 30, 2025
5pm CST Nov 30, 2025-6pm CST Dec 7, 2025
 
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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