National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fog/Mist

48°F

9°C

Humidity 93%
Wind Speed NW 20 G 30 mph
Barometer 29.87 in (1011.3 mb)
Dewpoint 46°F (8°C)
Visibility 3.00 mi
Wind Chill41°F (5°C)
Last update 7 Mar 12:54 pm CST
Extended Forecast for

2 Miles E Harristown IL

  • This Afternoon

    This Afternoon: A 20 percent chance of showers before 2pm. Cloudy, with a high near 61. Breezy, with a west northwest wind 16 to 20 mph, with gusts as high as 31 mph.

    High: 61 °F

    Slight Chance
    Showers and
    Breezy

  • Tonight

    Tonight: Mostly cloudy, with a low around 35. West northwest wind 6 to 14 mph, with gusts as high as 22 mph.

    Low: 35 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 63. Southwest wind 8 to 16 mph, with gusts as high as 23 mph.

    High: 63 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 44. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 44 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 73. South southwest wind 11 to 18 mph, with gusts as high as 25 mph.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 58. South southwest wind 10 to 14 mph, with gusts as high as 21 mph.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 78. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 29 mph.

    High: 78 °F

    Mostly Sunny
    then Chance
    T-storms and
    Breezy

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 50. Breezy. Chance of precipitation is 100%.

    Low: 50 °F

    Showers and
    Breezy

  • Wednesday

    Wednesday: Showers. High near 63. Breezy. Chance of precipitation is 90%.

    High: 63 °F

    Breezy.
    Showers then
    Showers
    Likely

Detailed Forecast

This Afternoon
A 20 percent chance of showers before 2pm. Cloudy, with a high near 61. Breezy, with a west northwest wind 16 to 20 mph, with gusts as high as 31 mph.
Tonight
Mostly cloudy, with a low around 35. West northwest wind 6 to 14 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 63. Southwest wind 8 to 16 mph, with gusts as high as 23 mph.
Sunday Night
Clear, with a low around 44. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.
Monday
Sunny, with a high near 73. South southwest wind 11 to 18 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 58. South southwest wind 10 to 14 mph, with gusts as high as 21 mph.
Tuesday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 78. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 29 mph.
Tuesday Night
Showers and possibly a thunderstorm. Low around 50. Breezy. Chance of precipitation is 100%.
Wednesday
Showers. High near 63. Breezy. Chance of precipitation is 90%.
Wednesday Night
Partly cloudy, with a low around 29. Blustery.
Thursday
Mostly sunny, with a high near 48.
Thursday Night
Mostly cloudy, with a low around 40. Breezy.
Friday
Mostly cloudy, with a high near 62. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles E Harristown IL
 39.84°N 89.03°W (Elev. 666 ft)
Last Update:
1:11 pm CST Mar 7, 2026
Forecast Valid:
1pm CST Mar 7, 2026-6pm CDT Mar 13, 2026
 
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Additional Resources

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Chance of Precipitation