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Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

86°F

30°C

Humidity 48%
Wind Speed SW 10 G 18 mph
Barometer 29.91 in (1012.3 mb)
Dewpoint 64°F (18°C)
Visibility 9.00 mi
Heat Index87°F (31°C)
Last update 13 Oct 12:54 pm CDT
Extended Forecast for

Clinton ILSimilar City Names

  • This Afternoon

    This Afternoon: Sunny, with a high near 91. West southwest wind around 11 mph, with gusts as high as 16 mph.

    High: 91 °F

    Sunny

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly after midnight. Increasing clouds, with a low around 68. West wind around 7 mph becoming southeast in the evening.

    Low: 68 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before 10am, then a chance of showers and thunderstorms, mainly between 10am and 5pm. Mostly cloudy, with a high near 74. Northeast wind 5 to 9 mph becoming southeast in the morning. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 74 °F

    Showers
    Likely then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 59. East northeast wind 10 to 13 mph, with gusts as high as 17 mph.

    Low: 59 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers, with thunderstorms also possible after 4pm. High near 73. East wind around 11 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 73 °F

    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 49. Breezy, with a northwest wind 14 to 21 mph, with gusts as high as 28 mph. Chance of precipitation is 50%.

    Low: 49 °F

    Chance
    T-storms then
    Chance
    Showers and
    Breezy

  • Friday

    Friday: Mostly sunny, with a high near 59. Breezy, with a north northwest wind 23 to 26 mph, with gusts as high as 33 mph.

    High: 59 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Areas of frost after 5am. Otherwise, mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear
    then Areas
    Frost

  • Saturday

    Saturday: Areas of frost before 8am. Otherwise, sunny, with a high near 61.

    High: 61 °F

    Areas Frost
    then Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 91. West southwest wind around 11 mph, with gusts as high as 16 mph.
Tonight
A 40 percent chance of showers and thunderstorms, mainly after midnight. Increasing clouds, with a low around 68. West wind around 7 mph becoming southeast in the evening.
Wednesday
Showers likely and possibly a thunderstorm before 10am, then a chance of showers and thunderstorms, mainly between 10am and 5pm. Mostly cloudy, with a high near 74. Northeast wind 5 to 9 mph becoming southeast in the morning. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 59. East northeast wind 10 to 13 mph, with gusts as high as 17 mph.
Thursday
Showers, with thunderstorms also possible after 4pm. High near 73. East wind around 11 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 49. Breezy, with a northwest wind 14 to 21 mph, with gusts as high as 28 mph. Chance of precipitation is 50%.
Friday
Mostly sunny, with a high near 59. Breezy, with a north northwest wind 23 to 26 mph, with gusts as high as 33 mph.
Friday Night
Areas of frost after 5am. Otherwise, mostly clear, with a low around 36.
Saturday
Areas of frost before 8am. Otherwise, sunny, with a high near 61.
Saturday Night
Clear, with a low around 38.
Sunday
Sunny, with a high near 69.
Sunday Night
Partly cloudy, with a low around 47.
Monday
Mostly sunny, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Clinton ILSimilar City Names
 40.15°N 88.95°W (Elev. 715 ft)
Last Update:
8:36 am CDT Oct 13, 2026
Forecast Valid:
1pm CDT Oct 13, 2026-6pm CDT Oct 19, 2026
 
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