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Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

67°F

19°C

Humidity 73%
Wind Speed W 3 mph
Barometer 30.04 in (1017.0 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 11 Oct 10:54 am CDT
Extended Forecast for

Clinton IL

  • Today

    Today: Sunny, with a high near 83. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 83 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 62. South wind 6 to 9 mph.

    Low: 62 °F

    Increasing
    Clouds

  • Columbus Day

    Columbus Day: Sunny, with a high near 90. Southwest wind 9 to 18 mph, with gusts as high as 24 mph.

    High: 90 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 71. South southwest wind around 14 mph, with gusts as high as 20 mph.

    Low: 71 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 88. Southwest wind 13 to 16 mph, with gusts as high as 21 mph.

    High: 88 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Showers likely after 1am. Partly cloudy, with a low around 64. Northwest wind around 7 mph becoming northeast after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 64 °F

    Mostly Clear
    then Showers
    Likely

  • Wednesday

    Wednesday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 78. Northeast wind 9 to 11 mph, with gusts as high as 15 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 78 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.

    Low: 58 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers likely. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.

    High: 74 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 83. Calm wind becoming west southwest around 5 mph in the afternoon.
Tonight
Increasing clouds, with a low around 62. South wind 6 to 9 mph.
Columbus Day
Sunny, with a high near 90. Southwest wind 9 to 18 mph, with gusts as high as 24 mph.
Monday Night
Mostly clear, with a low around 71. South southwest wind around 14 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 88. Southwest wind 13 to 16 mph, with gusts as high as 21 mph.
Tuesday Night
Showers likely after 1am. Partly cloudy, with a low around 64. Northwest wind around 7 mph becoming northeast after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 78. Northeast wind 9 to 11 mph, with gusts as high as 15 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.
Thursday
Showers likely. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.
Thursday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 52. Breezy.
Friday
Partly sunny, with a high near 66. Breezy.
Friday Night
Partly cloudy, with a low around 39. Breezy.
Saturday
Mostly sunny, with a high near 58.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Clinton IL
 40.15°N 88.95°W (Elev. 715 ft)
Last Update:
10:46 am CDT Oct 11, 2026
Forecast Valid:
11am CDT Oct 11, 2026-6pm CDT Oct 17, 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