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Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Overcast

74°F

23°C

Humidity 94%
Wind Speed SW 12 mph
Barometer 29.87 in (1011.2 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 15 Oct 5:54 pm CDT
Extended Forecast for

2 Miles ENE Harristown IL

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 11pm. Mostly cloudy, with a low around 46. Breezy, with a southwest wind 13 to 20 mph becoming west northwest after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 46 °F

    Showers
    Likely then
    Chance
    Showers and
    Breezy

  • Friday

    Friday: A 30 percent chance of showers, mainly after 4pm. Partly sunny, with a high near 55. Breezy, with a west northwest wind around 22 mph, with gusts as high as 33 mph.

    High: 55 °F

    Breezy.
    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming clear, with a low around 35. North wind 11 to 17 mph, with gusts as high as 28 mph.

    Low: 35 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 58. North wind around 6 mph becoming calm in the afternoon.

    High: 58 °F

    Sunny

  • Saturday Night

    Saturday Night: Areas of frost after 4am. Otherwise, clear, with a low around 35. Calm wind becoming south southeast around 5 mph after midnight.

    Low: 35 °F

    Clear then
    Areas Frost

  • Sunday

    Sunday: Areas of frost before 8am. Otherwise, sunny, with a high near 68. South wind 6 to 9 mph.

    High: 68 °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 70.

    High: 70 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers and thunderstorms likely, mainly before 11pm. Mostly cloudy, with a low around 46. Breezy, with a southwest wind 13 to 20 mph becoming west northwest after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A 30 percent chance of showers, mainly after 4pm. Partly sunny, with a high near 55. Breezy, with a west northwest wind around 22 mph, with gusts as high as 33 mph.
Friday Night
Mostly cloudy, then gradually becoming clear, with a low around 35. North wind 11 to 17 mph, with gusts as high as 28 mph.
Saturday
Sunny, with a high near 58. North wind around 6 mph becoming calm in the afternoon.
Saturday Night
Areas of frost after 4am. Otherwise, clear, with a low around 35. Calm wind becoming south southeast around 5 mph after midnight.
Sunday
Areas of frost before 8am. Otherwise, sunny, with a high near 68. South wind 6 to 9 mph.
Sunday Night
Mostly clear, with a low around 38. South southeast wind 3 to 6 mph.
Monday
Mostly sunny, with a high near 70.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 46.
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:
2 Miles ENE Harristown IL
 39.84°N 89.03°W (Elev. 666 ft)
Last Update:
4:36 pm CDT Oct 15, 2026
Forecast Valid:
6pm CDT Oct 15, 2026-6pm CDT Oct 22, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation