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.

Overcast

53°F

12°C

Humidity 77%
Wind Speed NW 15 G 23 mph
Barometer 29.84 in (1010.3 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 26 Dec 2:54 pm CST
Extended Forecast for

Decatur IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 60. Northwest wind 9 to 13 mph, with gusts as high as 20 mph.

    High: 60 °F

    Partly Sunny

  • Tonight

    Tonight: Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 43. North northwest wind 5 to 8 mph becoming calm.

    Low: 43 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 56. Southeast wind 6 to 13 mph, with gusts as high as 20 mph.

    High: 56 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Saturday Night

    Saturday Night: A 40 percent chance of rain after midnight. Cloudy, with a temperature rising to around 60 by 5am. South wind 10 to 14 mph, with gusts as high as 21 mph.

    Low: 54 °F⇑

    Cloudy then
    Chance Rain

  • Sunday

    Sunday: Rain. High near 68. South southwest wind 10 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 68 °F

    Rain

  • Sunday Night

    Sunday Night: Rain likely, mixing with snow after 9pm, then gradually ending. Mostly cloudy, with a low around 16. Windy, with a west northwest wind 20 to 30 mph, with gusts as high as 37 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 16 °F

    Wintry Mix
    Likely and
    Blustery then
    Mostly Cloudy
    and Windy

  • Monday

    Monday: Partly sunny, with a high near 24. Windy, with a west northwest wind 22 to 30 mph, with gusts as high as 39 mph.

    High: 24 °F

    Partly Sunny
    and Windy

  • Monday Night

    Monday Night: Mostly clear, with a low around 14.

    Low: 14 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 60. Northwest wind 9 to 13 mph, with gusts as high as 20 mph.
Tonight
Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 43. North northwest wind 5 to 8 mph becoming calm.
Saturday
Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 56. Southeast wind 6 to 13 mph, with gusts as high as 20 mph.
Saturday Night
A 40 percent chance of rain after midnight. Cloudy, with a temperature rising to around 60 by 5am. South wind 10 to 14 mph, with gusts as high as 21 mph.
Sunday
Rain. High near 68. South southwest wind 10 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday Night
Rain likely, mixing with snow after 9pm, then gradually ending. Mostly cloudy, with a low around 16. Windy, with a west northwest wind 20 to 30 mph, with gusts as high as 37 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Partly sunny, with a high near 24. Windy, with a west northwest wind 22 to 30 mph, with gusts as high as 39 mph.
Monday Night
Mostly clear, with a low around 14.
Tuesday
Mostly sunny, with a high near 31.
Tuesday Night
Partly cloudy, with a low around 24.
Wednesday
Partly sunny, with a high near 34.
Wednesday Night
Mostly cloudy, with a low around 14.
New Year's Day
Mostly sunny, with a high near 23.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.84°N 88.94°W (Elev. 692 ft)
Last Update:
3:17 pm CST Dec 26, 2025
Forecast Valid:
3pm CST Dec 26, 2025-6pm CST Jan 1, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation