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 and Breezy

69°F

21°C

Humidity 78%
Wind Speed S 21 G 31 mph
Barometer 29.76 in (1007.4 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 2 Apr 8:54 pm CDT
Extended Forecast for

2 Miles ENE Harristown IL

  • Tonight

    Tonight: A chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 2am. Mostly cloudy, with a low around 55. Breezy, with a south wind 17 to 22 mph becoming west 7 to 12 mph after midnight. Winds could gust as high as 36 mph. Chance of precipitation is 50%.

    Low: 55 °F

    Chance
    T-storms and
    Breezy then
    Chance
    Showers

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 77. Southwest wind 6 to 15 mph becoming southeast in the morning. Winds could gust as high as 23 mph.

    High: 77 °F

    Partly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1am. Low around 55. South wind 14 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 55 °F

    T-storms
    Likely then
    T-storms

  • Saturday

    Saturday: Showers likely, mainly before 1pm. Mostly cloudy, with a temperature falling to around 53 by 5pm. Breezy, with a west wind 14 to 20 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    High: 64 °F⇓

    Showers
    Likely and
    Breezy

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 37. West northwest wind 13 to 17 mph, with gusts as high as 24 mph.

    Low: 37 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Mostly sunny, with a high near 53. West northwest wind 13 to 16 mph, with gusts as high as 23 mph.

    High: 53 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37. West wind 6 to 10 mph, with gusts as high as 16 mph.

    Low: 37 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Monday Night

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

    Low: 32 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 2am. Mostly cloudy, with a low around 55. Breezy, with a south wind 17 to 22 mph becoming west 7 to 12 mph after midnight. Winds could gust as high as 36 mph. Chance of precipitation is 50%.
Friday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 77. Southwest wind 6 to 15 mph becoming southeast in the morning. Winds could gust as high as 23 mph.
Friday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1am. Low around 55. South wind 14 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday
Showers likely, mainly before 1pm. Mostly cloudy, with a temperature falling to around 53 by 5pm. Breezy, with a west wind 14 to 20 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 37. West northwest wind 13 to 17 mph, with gusts as high as 24 mph.
Sunday
Mostly sunny, with a high near 53. West northwest wind 13 to 16 mph, with gusts as high as 23 mph.
Sunday Night
Mostly clear, with a low around 37. West wind 6 to 10 mph, with gusts as high as 16 mph.
Monday
Sunny, with a high near 56.
Monday Night
Mostly clear, with a low around 32.
Tuesday
Sunny, with a high near 51.
Tuesday Night
Partly cloudy, with a low around 36.
Wednesday
Mostly sunny, with a high near 64. Breezy.
Wednesday Night
Partly cloudy, with a low around 50.
Thursday
Partly sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Harristown IL
 39.84°N 89.03°W (Elev. 666 ft)
Last Update:
8:51 pm CDT Apr 2, 2026
Forecast Valid:
9pm CDT Apr 2, 2026-6pm CDT Apr 9, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation