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

53°F

12°C

Humidity 80%
Wind Speed S 18 mph
Barometer 29.82 in (1010.0 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 17 Feb 1:54 pm CST
Extended Forecast for

Decatur IL

Wind Advisory February 17, 07:00pm until February 18, 01:00am
Click here for hazard details and duration
Wind Advisory

  • This Afternoon

    This Afternoon: A chance of sprinkles after 4pm. Cloudy, with a high near 59. South southeast wind around 16 mph, with gusts as high as 31 mph.

    High: 59 °F

    Chance
    Sprinkles

  • Tonight

    Tonight: A chance of rain or sprinkles before 3am, then a slight chance of rain between 3am and 5am. Cloudy, with a low around 52. Breezy, with a south wind 17 to 21 mph, with gusts as high as 43 mph. Chance of precipitation is 50%.

    Low: 52 °F

    Chance Rain
    and Breezy

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 68. West southwest wind 11 to 17 mph, with gusts as high as 28 mph.

    High: 68 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 47. South southeast wind around 7 mph.

    Low: 47 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A 50 percent chance of rain after noon. Partly sunny, with a high near 67. South southeast wind 8 to 14 mph, with gusts as high as 23 mph.

    High: 67 °F

    Partly Sunny
    then Chance
    Rain

  • Thursday Night

    Thursday Night: A 30 percent chance of rain before midnight. Partly cloudy, with a low around 35. South southwest wind 11 to 18 mph becoming west after midnight. Winds could gust as high as 28 mph.

    Low: 35 °F

    Chance Rain
    then Partly
    Cloudy

  • Friday

    Friday: Sunny, with a high near 45. West wind 11 to 18 mph, with gusts as high as 29 mph.

    High: 45 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 27.

    Low: 27 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A chance of sprinkles after 4pm. Cloudy, with a high near 59. South southeast wind around 16 mph, with gusts as high as 31 mph.
Tonight
A chance of rain or sprinkles before 3am, then a slight chance of rain between 3am and 5am. Cloudy, with a low around 52. Breezy, with a south wind 17 to 21 mph, with gusts as high as 43 mph. Chance of precipitation is 50%.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 68. West southwest wind 11 to 17 mph, with gusts as high as 28 mph.
Wednesday Night
Increasing clouds, with a low around 47. South southeast wind around 7 mph.
Thursday
A 50 percent chance of rain after noon. Partly sunny, with a high near 67. South southeast wind 8 to 14 mph, with gusts as high as 23 mph.
Thursday Night
A 30 percent chance of rain before midnight. Partly cloudy, with a low around 35. South southwest wind 11 to 18 mph becoming west after midnight. Winds could gust as high as 28 mph.
Friday
Sunny, with a high near 45. West wind 11 to 18 mph, with gusts as high as 29 mph.
Friday Night
Mostly clear, with a low around 27.
Saturday
Mostly sunny, with a high near 41.
Saturday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 24.
Sunday
Mostly sunny, with a high near 34.
Sunday Night
Mostly clear, with a low around 17.
Monday
Sunny, with a high near 34.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.84°N 88.94°W (Elev. 692 ft)
Last Update:
2:36 pm CST Feb 17, 2026
Forecast Valid:
2pm CST Feb 17, 2026-6pm CST Feb 23, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation