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Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

50°F

10°C

Humidity 74%
Wind Speed S 9 mph
Barometer 30.09 in (1018.7 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 21 Apr 3:54 am CDT
Extended Forecast for

Decatur IL

  • Today

    Today: Mostly sunny, with a high near 78. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 34 mph.

    High: 78 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 58. Southwest wind 11 to 15 mph, with gusts as high as 26 mph.

    Low: 58 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 10 percent chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 77. West southwest wind around 10 mph, with gusts as high as 17 mph.

    High: 77 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. South wind around 8 mph.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 81. South wind 9 to 17 mph, with gusts as high as 30 mph.

    High: 81 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 61. South wind around 15 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.

    Low: 61 °F

    Partly Cloudy
    then Chance
    T-storms

  • Friday

    Friday: Showers, with thunderstorms also possible after 1pm. High near 75. South wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 75 °F

    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 78. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 34 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 58. Southwest wind 11 to 15 mph, with gusts as high as 26 mph.
Wednesday
A 10 percent chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 77. West southwest wind around 10 mph, with gusts as high as 17 mph.
Wednesday Night
Mostly clear, with a low around 57. South wind around 8 mph.
Thursday
Mostly sunny, with a high near 81. South wind 9 to 17 mph, with gusts as high as 30 mph.
Thursday Night
A chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 61. South wind around 15 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.
Friday
Showers, with thunderstorms also possible after 1pm. High near 75. South wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Partly cloudy, with a low around 53.
Saturday
Mostly sunny, with a high near 71.
Saturday Night
Partly cloudy, with a low around 48.
Sunday
Mostly sunny, with a high near 73.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 55.
Monday
Showers likely. Mostly cloudy, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.84°N 88.94°W (Elev. 692 ft)
Last Update:
4:31 am CDT Apr 21, 2026
Forecast Valid:
4am CDT Apr 21, 2026-6pm CDT Apr 27, 2026
 
Forecast Discussion
 
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Additional Resources

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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