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

45°F

7°C

Humidity 86%
Wind Speed E 10 mph
Barometer 30.40 in (1029.6 mb)
Dewpoint 41°F (5°C)
Visibility 8.00 mi
Wind Chill40°F (4°C)
Last update 11 Apr 7:54 am CDT
Extended Forecast for

2 Miles ENE Harristown IL

  • Today

    Today: Increasing clouds, with a high near 66. East wind 9 to 11 mph, with gusts as high as 18 mph.

    High: 66 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, with a low around 57. Southeast wind 9 to 13 mph, with gusts as high as 23 mph.

    Low: 57 °F

    Mostly Cloudy

  • Sunday

    Sunday: Increasing clouds, with a high near 80. Breezy, with a south southwest wind 14 to 24 mph, with gusts as high as 34 mph.

    High: 80 °F

    Increasing
    Clouds and
    Breezy

  • Sunday Night

    Sunday Night: A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. Breezy, with a south southwest wind 18 to 22 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Showers
    Likely and
    Breezy

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 81. South southwest wind 16 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.

    High: 81 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 66. South wind 15 to 17 mph, with gusts as high as 25 mph.

    Low: 66 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. Breezy, with a south southwest wind 14 to 21 mph, with gusts as high as 29 mph.

    High: 84 °F

    Breezy.
    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 79. Chance of precipitation is 70%.

    High: 79 °F

    Showers
    Likely

Detailed Forecast

Today
Increasing clouds, with a high near 66. East wind 9 to 11 mph, with gusts as high as 18 mph.
Tonight
Mostly cloudy, with a low around 57. Southeast wind 9 to 13 mph, with gusts as high as 23 mph.
Sunday
Increasing clouds, with a high near 80. Breezy, with a south southwest wind 14 to 24 mph, with gusts as high as 34 mph.
Sunday Night
A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. Breezy, with a south southwest wind 18 to 22 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 81. South southwest wind 16 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.
Monday Night
Mostly cloudy, with a low around 66. South wind 15 to 17 mph, with gusts as high as 25 mph.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. Breezy, with a south southwest wind 14 to 21 mph, with gusts as high as 29 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Wednesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 79. Chance of precipitation is 70%.
Wednesday Night
Showers likely. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Thursday
Showers likely. Mostly cloudy, with a high near 77.
Thursday Night
A chance of showers. Partly cloudy, with a low around 59.
Friday
A chance of showers. Mostly sunny, with a high near 79.
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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:
7:36 am CDT Apr 11, 2026
Forecast Valid:
8am CDT Apr 11, 2026-6pm CDT Apr 17, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation