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Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Light Rain

55°F

13°C

Humidity 87%
Wind Speed NW 18 G 31 mph
Barometer 30.01 in (1016.1 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 16 Oct 1:54 am CDT
Extended Forecast for

Decatur IL

  • Overnight

    Overnight: Cloudy, with a low around 46. Breezy, with a west northwest wind 18 to 20 mph, with gusts as high as 29 mph.

    Low: 46 °F

    Cloudy and
    Breezy

  • Friday

    Friday: A 40 percent chance of showers, mainly after 2pm. Mostly cloudy, with a high near 54. Breezy, with a west northwest wind 18 to 21 mph, with gusts as high as 33 mph.

    High: 54 °F

    Breezy.
    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A 10 percent chance of showers before 7pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 36. North wind 10 to 17 mph, with gusts as high as 26 mph.

    Low: 36 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Saturday

    Saturday: Patchy frost before 8am. Otherwise, sunny, with a high near 59. North wind around 6 mph becoming calm in the morning.

    High: 59 °F

    Patchy Frost
    then Sunny

  • Saturday Night

    Saturday Night: Areas of frost after 4am. Otherwise, clear, with a low around 35. Light south southeast wind.

    Low: 35 °F

    Clear then
    Areas Frost

  • Sunday

    Sunday: Areas of frost before 8am. Otherwise, sunny, with a high near 67. South wind 5 to 8 mph.

    High: 67 °F

    Areas Frost
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 38. South southeast wind 3 to 6 mph.

    Low: 38 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

Detailed Forecast

Overnight
Cloudy, with a low around 46. Breezy, with a west northwest wind 18 to 20 mph, with gusts as high as 29 mph.
Friday
A 40 percent chance of showers, mainly after 2pm. Mostly cloudy, with a high near 54. Breezy, with a west northwest wind 18 to 21 mph, with gusts as high as 33 mph.
Friday Night
A 10 percent chance of showers before 7pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 36. North wind 10 to 17 mph, with gusts as high as 26 mph.
Saturday
Patchy frost before 8am. Otherwise, sunny, with a high near 59. North wind around 6 mph becoming calm in the morning.
Saturday Night
Areas of frost after 4am. Otherwise, clear, with a low around 35. Light south southeast wind.
Sunday
Areas of frost before 8am. Otherwise, sunny, with a high near 67. South wind 5 to 8 mph.
Sunday Night
Mostly clear, with a low around 38. South southeast wind 3 to 6 mph.
Monday
Mostly sunny, with a high near 72.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
Sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 79.
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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:
1:51 am CDT Oct 16, 2026
Forecast Valid:
2am CDT Oct 16, 2026-6pm CDT Oct 22, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation