Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

23°F

-5°C

Humidity 60%
Wind Speed W 9 mph
Barometer 30.24 in (1024.8 mb)
Dewpoint 11°F (-12°C)
Visibility 10.00 mi
Wind Chill13°F (-11°C)
Last update 22 Jan 1:54 am CST
Extended Forecast for

2 Miles ENE Harristown IL

Cold Weather Advisory January 23, 03:00am until January 24, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory
  • Overnight

    Overnight: Clear, with a low around 19. West northwest wind 9 to 14 mph, with gusts as high as 22 mph.

    Low: 19 °F

    Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 33. West wind 8 to 14 mph, with gusts as high as 22 mph.

    High: 33 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 0. Wind chill values between -3 and -13. West wind 7 to 12 mph becoming north northwest 13 to 18 mph after midnight. Winds could gust as high as 30 mph.

    Low: 0 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny and cold, with a high near 7. Wind chill values between -11 and -21. North northwest wind 13 to 18 mph, with gusts as high as 26 mph.

    High: 7 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 0. Northeast wind around 11 mph, with gusts as high as 17 mph.

    Low: 0 °F

    Mostly Cloudy

  • Saturday

    Saturday: Snow likely after noon.  Cloudy, with a high near 11. East northeast wind around 10 mph, with gusts as high as 17 mph.  Chance of precipitation is 60%.

    High: 11 °F

    Cloudy then
    Snow Likely

  • Saturday Night

    Saturday Night: Snow.  Low around 7. North northeast wind around 10 mph, with gusts as high as 16 mph.  Chance of precipitation is 80%.

    Low: 7 °F

    Snow

  • Sunday

    Sunday: A 40 percent chance of snow.  Mostly cloudy, with a high near 15.

    High: 15 °F

    Chance Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around -2.

    Low: -2 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 19. West northwest wind 9 to 14 mph, with gusts as high as 22 mph.
Thursday
Increasing clouds, with a high near 33. West wind 8 to 14 mph, with gusts as high as 22 mph.
Thursday Night
Mostly cloudy, with a low around 0. Wind chill values between -3 and -13. West wind 7 to 12 mph becoming north northwest 13 to 18 mph after midnight. Winds could gust as high as 30 mph.
Friday
Partly sunny and cold, with a high near 7. Wind chill values between -11 and -21. North northwest wind 13 to 18 mph, with gusts as high as 26 mph.
Friday Night
Mostly cloudy, with a low around 0. Northeast wind around 11 mph, with gusts as high as 17 mph.
Saturday
Snow likely after noon. Cloudy, with a high near 11. East northeast wind around 10 mph, with gusts as high as 17 mph. Chance of precipitation is 60%.
Saturday Night
Snow. Low around 7. North northeast wind around 10 mph, with gusts as high as 16 mph. Chance of precipitation is 80%.
Sunday
A 40 percent chance of snow. Mostly cloudy, with a high near 15.
Sunday Night
Mostly cloudy, with a low around -2.
Monday
Sunny, with a high near 15.
Monday Night
Mostly clear, with a low around 6.
Tuesday
Mostly sunny, with a high near 26.
Tuesday Night
Mostly cloudy, with a low around 12.
Wednesday
Partly sunny, with a high near 24.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Harristown IL
 39.84°N 89.03°W (Elev. 666 ft)
2:11 am CST Jan 22, 2026
2am CST Jan 22, 2026-6pm CST Jan 28, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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