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Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Fair

88°F

31°C

Humidity 36%
Wind Speed SW 14 G 24 mph
Barometer 29.91 in (1012.0 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 12 Oct 1:53 pm CDT
Extended Forecast for

Janesville IL

  • Columbus Day

    Columbus Day: Sunny, with a high near 90. Southwest wind around 13 mph, with gusts as high as 22 mph.

    High: 90 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 67. South southwest wind 7 to 10 mph, with gusts as high as 18 mph.

    Low: 67 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. Southwest wind 8 to 11 mph, with gusts as high as 18 mph.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers before 4am, then a chance of showers after 5am. Increasing clouds, with a low around 70. South southwest wind around 6 mph. Chance of precipitation is 30%.

    Low: 70 °F

    Clear then
    Chance
    Showers

  • Wednesday

    Wednesday: Showers, with thunderstorms also possible after 4pm. High near 82. Light and variable wind becoming southwest around 5 mph in the morning. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 82 °F

    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Calm wind becoming northeast around 6 mph in the evening. Chance of precipitation is 50%.

    Low: 63 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: Showers, with thunderstorms also possible after 1pm. High near 78. East northeast wind around 7 mph becoming south southwest in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 78 °F

    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 52.

    Low: 52 °F

    Chance
    Showers

  • Friday

    Friday: Partly sunny, with a high near 63. Breezy.

    High: 63 °F

    Partly Sunny
    and Breezy

Detailed Forecast

Columbus Day
Sunny, with a high near 90. Southwest wind around 13 mph, with gusts as high as 22 mph.
Tonight
Mostly clear, with a low around 67. South southwest wind 7 to 10 mph, with gusts as high as 18 mph.
Tuesday
Sunny, with a high near 93. Southwest wind 8 to 11 mph, with gusts as high as 18 mph.
Tuesday Night
A chance of showers before 4am, then a chance of showers after 5am. Increasing clouds, with a low around 70. South southwest wind around 6 mph. Chance of precipitation is 30%.
Wednesday
Showers, with thunderstorms also possible after 4pm. High near 82. Light and variable wind becoming southwest around 5 mph in the morning. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Calm wind becoming northeast around 6 mph in the evening. Chance of precipitation is 50%.
Thursday
Showers, with thunderstorms also possible after 1pm. High near 78. East northeast wind around 7 mph becoming south southwest in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 52.
Friday
Partly sunny, with a high near 63. Breezy.
Friday Night
Mostly clear, with a low around 38.
Saturday
Sunny, with a high near 61.
Saturday Night
Clear, with a low around 37.
Sunday
Sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Janesville IL
 39.37°N 88.25°W (Elev. 669 ft)
Last Update:
1:26 pm CDT Oct 12, 2026
Forecast Valid:
2pm CDT Oct 12, 2026-6pm CDT Oct 18, 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