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

Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

68°F

20°C

Humidity 70%
Wind Speed SW 16 mph
Barometer 29.92 in (1012.6 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 13 Apr 12:54 am CDT
Extended Forecast for

Decatur Airport IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 64. Breezy, with a southwest wind 16 to 20 mph, with gusts as high as 32 mph.

    Low: 64 °F

    Mostly Cloudy
    and Breezy

  • Monday

    Monday: Partly sunny, with a high near 82. Southwest wind 15 to 18 mph, with gusts as high as 29 mph.

    High: 82 °F

    Partly Sunny

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers after 4am. Partly cloudy, with a low around 66. Breezy, with a south southwest wind 16 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.

    Low: 66 °F

    Slight Chance
    T-storms and
    Breezy then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. Breezy, with a south southwest wind 16 to 21 mph, with gusts as high as 30 mph.

    High: 84 °F

    Partly Sunny
    then Chance
    T-storms and
    Breezy

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. South southwest wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 77. South southwest wind 13 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 77 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 61. South southwest wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 61 °F

    Showers

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 79. Chance of precipitation is 40%.

    High: 79 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 64. Breezy, with a southwest wind 16 to 20 mph, with gusts as high as 32 mph.
Monday
Partly sunny, with a high near 82. Southwest wind 15 to 18 mph, with gusts as high as 29 mph.
Monday Night
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers after 4am. Partly cloudy, with a low around 66. Breezy, with a south southwest wind 16 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. Breezy, with a south southwest wind 16 to 21 mph, with gusts as high as 30 mph.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. South southwest wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers and possibly a thunderstorm. High near 77. South southwest wind 13 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Showers and possibly a thunderstorm. Low around 61. South southwest wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 79. Chance of precipitation is 40%.
Thursday Night
Mostly clear, with a low around 58.
Friday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 85.
Friday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 60.
Saturday
Showers and thunderstorms likely. Mostly cloudy, with a high near 71.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 41.
Sunday
Sunny, with a high near 60.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Decatur Airport IL
 39.84°N 88.85°W (Elev. 686 ft)
Last Update:
1:20 am CDT Apr 13, 2026
Forecast Valid:
1am CDT Apr 13, 2026-6pm CDT Apr 19, 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