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.

Overcast

36°F

2°C

Humidity 62%
Wind Speed E 13 mph
Barometer 30.48 in (1032.7 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 7 Apr 11:54 am CDT
Extended Forecast for

2 Miles ENE Harristown IL

  • This Afternoon

    This Afternoon: Cloudy, then gradually becoming mostly sunny, with a high near 48. East wind around 11 mph, with gusts as high as 16 mph.

    High: 48 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: A chance of sprinkles between 10pm and midnight. Mostly cloudy, with a low around 38. East wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 38 °F

    Chance
    Sprinkles

  • Wednesday

    Wednesday: Partly sunny, with a high near 69. Breezy, with a south wind 13 to 21 mph, with gusts as high as 29 mph.

    High: 69 °F

    Partly Sunny
    then Mostly
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53. South wind around 17 mph, with gusts as high as 25 mph.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 74. South southwest wind 13 to 15 mph, with gusts as high as 22 mph.

    High: 74 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 55. South wind 9 to 13 mph, with gusts as high as 20 mph.

    Low: 55 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 67. South southwest wind 9 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 67 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Chance
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers. Partly sunny, with a high near 68.

    High: 68 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Cloudy, then gradually becoming mostly sunny, with a high near 48. East wind around 11 mph, with gusts as high as 16 mph.
Tonight
A chance of sprinkles between 10pm and midnight. Mostly cloudy, with a low around 38. East wind 8 to 11 mph, with gusts as high as 21 mph.
Wednesday
Partly sunny, with a high near 69. Breezy, with a south wind 13 to 21 mph, with gusts as high as 29 mph.
Wednesday Night
Partly cloudy, with a low around 53. South wind around 17 mph, with gusts as high as 25 mph.
Thursday
Mostly sunny, with a high near 74. South southwest wind 13 to 15 mph, with gusts as high as 22 mph.
Thursday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 55. South wind 9 to 13 mph, with gusts as high as 20 mph.
Friday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 67. South southwest wind 9 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 47.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 68.
Saturday Night
Mostly cloudy, with a low around 57.
Sunday
Mostly cloudy, with a high near 78. Breezy.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 63.
Monday
A chance of showers. Partly sunny, with a high near 81. Breezy.
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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:
12:31 pm CDT Apr 7, 2026
Forecast Valid:
12pm CDT Apr 7, 2026-6pm CDT Apr 13, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation