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

67°F

19°C

Humidity 59%
Wind Speed SW 9 mph
Barometer 30.04 in (1017.2 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 14 Nov 10:53 am CST
Extended Forecast for

Janesville IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 72. South southwest wind around 10 mph, with gusts as high as 16 mph.

    High: 72 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 57. Southwest wind 8 to 13 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Cloudy, then gradually becoming mostly sunny, with a high near 73. Southwest wind 9 to 18 mph, with gusts as high as 28 mph.

    High: 73 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 41. North northwest wind 9 to 13 mph, with gusts as high as 17 mph.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 55. North northwest wind 6 to 10 mph, with gusts as high as 16 mph.

    High: 55 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 34. West northwest wind around 5 mph becoming calm in the evening.

    Low: 34 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 55. Calm wind becoming east 5 to 7 mph in the morning.

    High: 55 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Rain likely. Mostly cloudy, with a low around 39. Chance of precipitation is 70%.

    Low: 39 °F

    Rain Likely

  • Tuesday

    Tuesday: A 30 percent chance of rain before noon. Partly sunny, with a high near 51.

    High: 51 °F

    Chance Rain
    then Partly
    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 72. South southwest wind around 10 mph, with gusts as high as 16 mph.
Tonight
Increasing clouds, with a low around 57. Southwest wind 8 to 13 mph, with gusts as high as 20 mph.
Saturday
Cloudy, then gradually becoming mostly sunny, with a high near 73. Southwest wind 9 to 18 mph, with gusts as high as 28 mph.
Saturday Night
Mostly clear, with a low around 41. North northwest wind 9 to 13 mph, with gusts as high as 17 mph.
Sunday
Sunny, with a high near 55. North northwest wind 6 to 10 mph, with gusts as high as 16 mph.
Sunday Night
Mostly clear, with a low around 34. West northwest wind around 5 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 55. Calm wind becoming east 5 to 7 mph in the morning.
Monday Night
Rain likely. Mostly cloudy, with a low around 39. Chance of precipitation is 70%.
Tuesday
A 30 percent chance of rain before noon. Partly sunny, with a high near 51.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
Partly sunny, with a high near 51.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 37.
Thursday
Rain likely. Mostly cloudy, with a high near 54.
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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:
10:51 am CST Nov 14, 2025
Forecast Valid:
12pm CST Nov 14, 2025-6pm CST Nov 20, 2025
 
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