Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

64°F

18°C

Humidity 75%
Wind Speed SW 5 mph
Barometer 29.96 in (1014.2 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 22 Apr 11:54 pm CDT
Extended Forecast for

Decatur IL

  • Overnight

    Overnight: Mostly clear, with a low around 58. South wind around 7 mph.

    Low: 58 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 80. South wind 7 to 17 mph, with gusts as high as 28 mph.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 61. South wind around 15 mph, with gusts as high as 25 mph.

    Low: 61 °F

    Partly Cloudy
    then Chance
    T-storms

  • Friday

    Friday: Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm.  High near 74. South wind 11 to 14 mph becoming west in the afternoon. Winds could gust as high as 22 mph.  Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 74 °F

    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers before 1am.  Partly cloudy, with a low around 52. North northwest wind around 9 mph, with gusts as high as 15 mph.

    Low: 52 °F

    Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 73. North northeast wind around 10 mph, with gusts as high as 16 mph.

    High: 73 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 50. East northeast wind around 9 mph, with gusts as high as 15 mph.

    Low: 50 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 74.

    High: 74 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of showers, with thunderstorms also possible after 1am.  Mostly cloudy, with a low around 60. Chance of precipitation is 50%.

    Low: 60 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Overnight
Mostly clear, with a low around 58. South wind around 7 mph.
Thursday
Sunny, with a high near 80. South wind 7 to 17 mph, with gusts as high as 28 mph.
Thursday Night
A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 61. South wind around 15 mph, with gusts as high as 25 mph.
Friday
Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. High near 74. South wind 11 to 14 mph becoming west in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
A 30 percent chance of showers before 1am. Partly cloudy, with a low around 52. North northwest wind around 9 mph, with gusts as high as 15 mph.
Saturday
Sunny, with a high near 73. North northeast wind around 10 mph, with gusts as high as 16 mph.
Saturday Night
Partly cloudy, with a low around 50. East northeast wind around 9 mph, with gusts as high as 15 mph.
Sunday
Partly sunny, with a high near 74.
Sunday Night
A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 60. Chance of precipitation is 50%.
Monday
Showers and possibly a thunderstorm. High near 75. Breezy. Chance of precipitation is 80%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 51. Breezy.
Tuesday
Mostly sunny, with a high near 67.
Tuesday Night
Partly cloudy, with a low around 48.
Wednesday
Mostly sunny, with a high near 66.
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ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.84°N 88.94°W (Elev. 692 ft)
12:36 am CDT Apr 23, 2026
12am CDT Apr 23, 2026-6pm CDT Apr 29, 2026
 
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Additional Resources

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