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

53°F

12°C

Humidity 66%
Wind Speed SW 10 mph
Barometer 29.92 in (1013.0 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 20 Mar 2:54 am CDT
Extended Forecast for

2 Miles ENE Harristown IL

  • Overnight

    Overnight: Partly cloudy, with a low around 47. Southwest wind around 8 mph, with gusts as high as 17 mph.

    Low: 47 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 79. Southwest wind 8 to 15 mph becoming west northwest in the afternoon. Winds could gust as high as 22 mph.

    High: 79 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 45. North northwest wind 6 to 9 mph becoming east after midnight. Winds could gust as high as 15 mph.

    Low: 45 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 78. East wind 6 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 16 mph.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 58. South southwest wind 8 to 14 mph, with gusts as high as 21 mph.

    Low: 58 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 81. Breezy, with a south southwest wind 14 to 20 mph becoming west northwest in the afternoon. Winds could gust as high as 28 mph.

    High: 81 °F

    Mostly Sunny
    then Partly
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 36. Breezy, with a north wind 16 to 20 mph, with gusts as high as 29 mph.

    Low: 36 °F

    Mostly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Monday

    Monday: Sunny, with a high near 53.

    High: 53 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 47. Southwest wind around 8 mph, with gusts as high as 17 mph.
Friday
Partly sunny, with a high near 79. Southwest wind 8 to 15 mph becoming west northwest in the afternoon. Winds could gust as high as 22 mph.
Friday Night
Mostly cloudy, with a low around 45. North northwest wind 6 to 9 mph becoming east after midnight. Winds could gust as high as 15 mph.
Saturday
Sunny, with a high near 78. East wind 6 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 16 mph.
Saturday Night
Mostly clear, with a low around 58. South southwest wind 8 to 14 mph, with gusts as high as 21 mph.
Sunday
Increasing clouds, with a high near 81. Breezy, with a south southwest wind 14 to 20 mph becoming west northwest in the afternoon. Winds could gust as high as 28 mph.
Sunday Night
Partly cloudy, with a low around 36. Breezy, with a north wind 16 to 20 mph, with gusts as high as 29 mph.
Monday
Sunny, with a high near 53.
Monday Night
Partly cloudy, with a low around 36.
Tuesday
Partly sunny, with a high near 59.
Tuesday Night
Mostly cloudy, with a low around 39.
Wednesday
Partly sunny, with a high near 61.
Wednesday Night
Mostly cloudy, with a low around 47.
Thursday
Mostly sunny, with a high near 72. Breezy.
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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:
3:36 am CDT Mar 20, 2026
Forecast Valid:
3am CDT Mar 20, 2026-6pm CDT Mar 26, 2026
 
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