Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

53°F

12°C

Humidity 32%
Wind Speed Vrbl 3 mph
Barometer 30.35 in (1027.9 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Last update 20 Apr 11:54 am CDT
Extended Forecast for

Decatur IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 62. South wind 3 to 6 mph.

    High: 62 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 48. South wind 6 to 11 mph, with gusts as high as 20 mph.

    Low: 48 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 78. Southwest wind 10 to 18 mph, with gusts as high as 32 mph.

    High: 78 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 58. Southwest wind 10 to 14 mph, with gusts as high as 23 mph.

    Low: 58 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77. West southwest wind 8 to 10 mph, with gusts as high as 16 mph.

    High: 77 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. South wind 7 to 9 mph, with gusts as high as 15 mph.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 80. Breezy, with a south wind 10 to 20 mph, with gusts as high as 31 mph.

    High: 80 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm after 1am.  Mostly cloudy, with a low around 62. Chance of precipitation is 70%.

    Low: 62 °F

    Mostly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Showers likely, with thunderstorms also possible after 1pm.  Mostly cloudy, with a high near 74. Chance of precipitation is 70%.

    High: 74 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 62. South wind 3 to 6 mph.
Tonight
Increasing clouds, with a low around 48. South wind 6 to 11 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 78. Southwest wind 10 to 18 mph, with gusts as high as 32 mph.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 58. Southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Wednesday
Mostly sunny, with a high near 77. West southwest wind 8 to 10 mph, with gusts as high as 16 mph.
Wednesday Night
Mostly clear, with a low around 57. South wind 7 to 9 mph, with gusts as high as 15 mph.
Thursday
Mostly sunny, with a high near 80. Breezy, with a south wind 10 to 20 mph, with gusts as high as 31 mph.
Thursday Night
Showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 70%.
Friday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 50.
Saturday
Mostly sunny, with a high near 70.
Saturday Night
Partly cloudy, with a low around 49.
Sunday
Mostly sunny, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.84°N 88.94°W (Elev. 692 ft)
12:21 pm CDT Apr 20, 2026
12pm CDT Apr 20, 2026-6pm CDT Apr 26, 2026
 
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Additional Resources

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