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.

Fog

42°F

6°C

Humidity 100%
Wind Speed NE 10 mph
Barometer 30.10 in (1019.7 mb)
Dewpoint 42°F (6°C)
Visibility 0.50 mi
Wind Chill36°F (2°C)
Last update 4 Mar 5:53 am CST
Extended Forecast for

Sullivan IL

  • Today

    Today: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. Areas of fog. High near 54. Northeast wind 5 to 8 mph becoming east southeast in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 54 °F

    Chance
    Showers and
    Areas Fog
    then Showers
    and Areas Fog

  • Tonight

    Tonight: Showers likely, then showers and possibly a thunderstorm after 9pm. Areas of fog. Low around 50. East wind 5 to 8 mph becoming south after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 50 °F

    Showers
    Likely and
    Areas Fog
    then Showers
    and Areas Fog

  • Thursday

    Thursday: Showers, mainly before noon. Patchy fog before 9am. High near 62. West southwest wind 5 to 10 mph, with gusts as high as 17 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 62 °F

    Showers and
    Patchy Fog
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm, mainly after 3am. Mostly cloudy, with a low around 53. Calm wind becoming south 5 to 9 mph in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 53 °F

    Mostly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Showers likely, mainly before noon. Partly sunny, with a high near 75. Breezy, with a south wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 75 °F

    Breezy.
    Showers
    Likely then
    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers before midnight, then showers and possibly a thunderstorm between midnight and 3am, then showers after 3am. Low around 53. South wind 14 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 53 °F

    Chance
    Showers then
    Showers

  • Saturday

    Saturday: A 50 percent chance of showers before noon. Mostly cloudy, with a high near 62. Southwest wind 9 to 15 mph becoming west northwest in the afternoon. Winds could gust as high as 24 mph.

    High: 62 °F

    Chance
    Showers then
    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

Detailed Forecast

Today
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. Areas of fog. High near 54. Northeast wind 5 to 8 mph becoming east southeast in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers likely, then showers and possibly a thunderstorm after 9pm. Areas of fog. Low around 50. East wind 5 to 8 mph becoming south after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
Showers, mainly before noon. Patchy fog before 9am. High near 62. West southwest wind 5 to 10 mph, with gusts as high as 17 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Showers likely and possibly a thunderstorm, mainly after 3am. Mostly cloudy, with a low around 53. Calm wind becoming south 5 to 9 mph in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Showers likely, mainly before noon. Partly sunny, with a high near 75. Breezy, with a south wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A chance of showers before midnight, then showers and possibly a thunderstorm between midnight and 3am, then showers after 3am. Low around 53. South wind 14 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A 50 percent chance of showers before noon. Mostly cloudy, with a high near 62. Southwest wind 9 to 15 mph becoming west northwest in the afternoon. Winds could gust as high as 24 mph.
Saturday Night
Mostly clear, with a low around 37.
Sunday
Sunny, with a high near 62.
Sunday Night
Mostly clear, with a low around 44.
Monday
Sunny, with a high near 72.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 57.
Tuesday
Showers likely. Mostly cloudy, with a high near 73. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.59°N 88.61°W (Elev. 669 ft)
Last Update:
5:06 am CST Mar 4, 2026
Forecast Valid:
6am CST Mar 4, 2026-6pm CDT Mar 10, 2026
 
Forecast Discussion
 
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