Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

27°F

-3°C

Humidity 85%
Wind Speed S 3 mph
Barometer 30.29 in (1026.4 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 12 Feb 1:54 am CST
Extended Forecast for

Decatur IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 29. Light west southwest wind.

    Low: 29 °F

    Mostly Cloudy

  • Thursday

    Thursday: Scattered sprinkles before noon, then isolated showers between noon and 1pm.  Mostly cloudy, with a high near 47. Calm wind becoming southwest around 6 mph in the afternoon.  Chance of precipitation is 20%.

    High: 47 °F

    Cloudy then
    Isolated
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 30. Southeast wind around 6 mph.

    Low: 30 °F

    Mostly Cloudy

  • Friday

    Friday: Sunny, with a high near 54. South wind 6 to 10 mph, with gusts as high as 16 mph.

    High: 54 °F

    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 33. South wind 3 to 6 mph.

    Low: 33 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A 30 percent chance of rain after noon.  Cloudy, with a high near 51. South southeast wind 3 to 7 mph.

    High: 51 °F

    Mostly Cloudy
    then Chance
    Rain

  • Saturday Night

    Saturday Night: A 50 percent chance of rain.  Mostly cloudy, with a low around 39. East southeast wind around 7 mph becoming northeast after midnight.

    Low: 39 °F

    Chance Rain

  • Sunday

    Sunday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 32.

    Low: 32 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 29. Light west southwest wind.
Thursday
Scattered sprinkles before noon, then isolated showers between noon and 1pm. Mostly cloudy, with a high near 47. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 30. Southeast wind around 6 mph.
Friday
Sunny, with a high near 54. South wind 6 to 10 mph, with gusts as high as 16 mph.
Friday Night
Increasing clouds, with a low around 33. South wind 3 to 6 mph.
Saturday
A 30 percent chance of rain after noon. Cloudy, with a high near 51. South southeast wind 3 to 7 mph.
Saturday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 39. East southeast wind around 7 mph becoming northeast after midnight.
Sunday
Mostly sunny, with a high near 56.
Sunday Night
Mostly clear, with a low around 32.
Washington's Birthday
Partly sunny, with a high near 57.
Monday Night
Mostly cloudy, with a low around 42.
Tuesday
Cloudy, with a high near 61.
Tuesday Night
Mostly cloudy, with a low around 51.
Wednesday
Partly sunny, with a high near 62.
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ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.84°N 88.94°W (Elev. 692 ft)
2:26 am CST Feb 12, 2026
2am CST Feb 12, 2026-6pm CST Feb 18, 2026
 
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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