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

Hazardous Weather Conditions

Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Fair

19°F

-7°C

Humidity 59%
Wind Speed W 12 mph
Barometer 30.07 in (1019.2 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill6°F (-14°C)
Last update 15 Jan 9:53 am CST
Extended Forecast for

Sullivan IL

  • Today

    Today: Sunny, with a high near 28. Northwest wind 7 to 10 mph becoming south southwest in the afternoon. Winds could gust as high as 16 mph.

    High: 28 °F

    Sunny

  • Tonight

    Tonight: Snow, mainly between 10pm and 2am. Low around 22. South wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 22 °F

    Snow

  • Friday

    Friday: Mostly cloudy, with a high near 39. West wind 13 to 17 mph, with gusts as high as 28 mph.

    High: 39 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Scattered snow showers, mainly after midnight. Mostly cloudy, with a low around 17. West northwest wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Low: 17 °F

    Mostly Cloudy
    then
    Scattered
    Snow Showers

  • Saturday

    Saturday: Scattered flurries. Partly sunny, with a high near 22. West wind 11 to 15 mph, with gusts as high as 24 mph.

    High: 22 °F

    Scattered
    Flurries

  • Saturday Night

    Saturday Night: Scattered flurries before midnight. Partly cloudy, with a low around 8. West northwest wind around 10 mph, with gusts as high as 18 mph.

    Low: 8 °F

    Scattered
    Flurries

  • Sunday

    Sunday: Mostly sunny, with a high near 20. Southwest wind 9 to 13 mph, with gusts as high as 21 mph.

    High: 20 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 8.

    Low: 8 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 18.

    High: 18 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 28. Northwest wind 7 to 10 mph becoming south southwest in the afternoon. Winds could gust as high as 16 mph.
Tonight
Snow, mainly between 10pm and 2am. Low around 22. South wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Friday
Mostly cloudy, with a high near 39. West wind 13 to 17 mph, with gusts as high as 28 mph.
Friday Night
Scattered snow showers, mainly after midnight. Mostly cloudy, with a low around 17. West northwest wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Saturday
Scattered flurries. Partly sunny, with a high near 22. West wind 11 to 15 mph, with gusts as high as 24 mph.
Saturday Night
Scattered flurries before midnight. Partly cloudy, with a low around 8. West northwest wind around 10 mph, with gusts as high as 18 mph.
Sunday
Mostly sunny, with a high near 20. Southwest wind 9 to 13 mph, with gusts as high as 21 mph.
Sunday Night
Partly cloudy, with a low around 8.
M.L.King Day
Mostly sunny, with a high near 18.
Monday Night
Mostly clear, with a low around 4.
Tuesday
Sunny, with a high near 22.
Tuesday Night
Partly cloudy, with a low around 14.
Wednesday
Mostly sunny, with a high near 35.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.59°N 88.61°W (Elev. 669 ft)
Last Update:
10:41 am CST Jan 15, 2026
Forecast Valid:
10am CST Jan 15, 2026-6pm CST Jan 21, 2026
 
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Additional Resources

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Chance of Precipitation