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

55°F

13°C

Humidity 74%
Wind Speed N 10 mph
Barometer 30.32 in (1026.6 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 10 Apr 5:54 pm CDT
Extended Forecast for

2 Miles ENE Harristown IL

  • Tonight

    Tonight: Partly cloudy, with a low around 44. North wind 6 to 10 mph becoming east after midnight. Winds could gust as high as 15 mph.

    Low: 44 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers after 2pm. Partly sunny, with a high near 65. East wind 8 to 11 mph, with gusts as high as 18 mph.

    High: 65 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 56. Southeast wind 9 to 14 mph, with gusts as high as 22 mph.

    Low: 56 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 79. Breezy, with a south southwest wind 14 to 24 mph, with gusts as high as 36 mph.

    High: 79 °F

    Partly Sunny
    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 21 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter 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 82. Breezy, with a south southwest wind 16 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.

    High: 82 °F

    Breezy.
    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 65. South wind around 16 mph, with gusts as high as 25 mph.

    Low: 65 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. Breezy.

    High: 84 °F

    Breezy.
    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.

    Low: 65 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 44. North wind 6 to 10 mph becoming east after midnight. Winds could gust as high as 15 mph.
Saturday
A 20 percent chance of showers after 2pm. Partly sunny, with a high near 65. East wind 8 to 11 mph, with gusts as high as 18 mph.
Saturday Night
Mostly cloudy, with a low around 56. Southeast wind 9 to 14 mph, with gusts as high as 22 mph.
Sunday
Partly sunny, with a high near 79. Breezy, with a south southwest wind 14 to 24 mph, with gusts as high as 36 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 21 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter 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 82. Breezy, with a south southwest wind 16 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.
Monday Night
Mostly cloudy, with a low around 65. South wind around 16 mph, with gusts as high as 25 mph.
Tuesday
A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. Breezy.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 80. Chance of precipitation is 50%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 59.
Thursday
A chance of showers. Partly sunny, with a high near 78.
Thursday Night
A chance of showers. Partly cloudy, with a low around 58.
Friday
A chance of showers. Partly 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:
4:51 pm CDT Apr 10, 2026
Forecast Valid:
6pm CDT Apr 10, 2026-6pm CDT Apr 17, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation