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.

Fair

48°F

9°C

Humidity 52%
Wind Speed S 10 mph
Barometer 30.22 in (1023.8 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 13 Feb 10:54 am CST
Extended Forecast for

2 Miles ENE Harristown IL

  • Today

    Today: Sunny, with a high near 55. South southwest wind 9 to 14 mph, with gusts as high as 21 mph.

    High: 55 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 33. South wind 3 to 8 mph. Winds could gust as high as 15 mph.

    Low: 33 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A 20 percent chance of rain after 10am. Cloudy, with a high near 52. South wind 3 to 7 mph.

    High: 52 °F

    Slight Chance
    Rain

  • Saturday Night

    Saturday Night: Rain likely. Cloudy, with a low around 40. East wind 6 to 8 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 40 °F

    Rain Likely

  • Sunday

    Sunday: Cloudy through mid morning, then gradual clearing, with a high near 57. Northeast wind 6 to 9 mph.

    High: 57 °F

    Gradual
    Clearing

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36. North wind around 5 mph becoming light and variable.

    Low: 36 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 58. South wind 5 to 9 mph.

    High: 58 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 60.

    High: 60 °F

    Mostly Cloudy

Detailed Forecast

Today
Sunny, with a high near 55. South southwest wind 9 to 14 mph, with gusts as high as 21 mph.
Tonight
Increasing clouds, with a low around 33. South wind 3 to 8 mph. Winds could gust as high as 15 mph.
Saturday
A 20 percent chance of rain after 10am. Cloudy, with a high near 52. South wind 3 to 7 mph.
Saturday Night
Rain likely. Cloudy, with a low around 40. East wind 6 to 8 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
Cloudy through mid morning, then gradual clearing, with a high near 57. Northeast wind 6 to 9 mph.
Sunday Night
Mostly clear, with a low around 36. North wind around 5 mph becoming light and variable.
Washington's Birthday
Partly sunny, with a high near 58. South wind 5 to 9 mph.
Monday Night
Mostly cloudy, with a low around 41.
Tuesday
Mostly cloudy, with a high near 60.
Tuesday Night
Mostly cloudy, with a low around 51.
Wednesday
Partly sunny, with a high near 67. Breezy.
Wednesday Night
A chance of rain. Partly cloudy, with a low around 43.
Thursday
Mostly sunny, with a high near 59.
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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:
11:36 am CST Feb 13, 2026
Forecast Valid:
11am CST Feb 13, 2026-6pm CST Feb 19, 2026
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation