Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Light Snow

8°F

-13°C

Humidity 80%
Wind Speed NE 15 mph
Barometer 30.45 in (1032.8 mb)
Dewpoint 3°F (-16°C)
Visibility 1.25 mi
Wind Chill-9°F (-23°C)
Last update 24 Jan 4:54 pm CST
Extended Forecast for

2 Miles ENE Harristown IL

Cold Weather Advisory January 26, 12:00am until January 26, 12:00pm
Winter Storm Warning January 24, 05:15pm until January 25, 09:00pm
Click here for hazard details and duration
Cold Weather Advisory
Winter Storm Warning
  •  
    Winter Storm Warning January 24, 05:15pm until January 25, 09:00pm

    NOW until 9:00pm Sun

    Winter Storm Warning

  • This Afternoon

    High: 11 °F

    Snow

  • Tonight

    Tonight: Snow.  Low around 8. Wind chill values between -2 and -7. Northeast wind 9 to 11 mph, with gusts as high as 21 mph.  Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    Low: 8 °F

    Snow

  • Sunday

    Sunday: Snow, mainly before 4pm.  High near 13. Wind chill values between -2 and -7. North northeast wind 13 to 16 mph, with gusts as high as 24 mph.  Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.

    High: 13 °F

    Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around -4. Wind chill values between -13 and -23. Northwest wind 13 to 15 mph, with gusts as high as 23 mph.

    Low: -4 °F

    Decreasing
    Clouds

  • Monday

    Monday: Sunny and cold, with a high near 10. Northwest wind 10 to 14 mph becoming west southwest in the afternoon. Winds could gust as high as 21 mph.

    High: 10 °F

    Cold

  • Monday Night

    Monday Night: Mostly clear, with a low around 1. Southwest wind 9 to 17 mph, with gusts as high as 25 mph.

    Low: 1 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 24. West northwest wind 10 to 16 mph, with gusts as high as 24 mph.

    High: 24 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around -1.

    Low: -1 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Snow. High near 11. Wind chill values between -3 and 2. East northeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 80%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Snow. Low around 8. Wind chill values between -2 and -7. Northeast wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Sunday
Snow, mainly before 4pm. High near 13. Wind chill values between -2 and -7. North northeast wind 13 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.
Sunday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around -4. Wind chill values between -13 and -23. Northwest wind 13 to 15 mph, with gusts as high as 23 mph.
Monday
Sunny and cold, with a high near 10. Northwest wind 10 to 14 mph becoming west southwest in the afternoon. Winds could gust as high as 21 mph.
Monday Night
Mostly clear, with a low around 1. Southwest wind 9 to 17 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 24. West northwest wind 10 to 16 mph, with gusts as high as 24 mph.
Tuesday Night
Partly cloudy, with a low around -1.
Wednesday
Partly sunny, with a high near 17.
Wednesday Night
Partly cloudy, with a low around -3.
Thursday
Mostly sunny, with a high near 14.
Thursday Night
Partly cloudy, with a low around 1.
Friday
Mostly sunny, with a high near 15.
Friday Night
Partly cloudy, with a low around 1.
Saturday
Mostly sunny, with a high near 19.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Harristown IL
 39.84°N 89.03°W (Elev. 666 ft)
3:36 pm CST Jan 24, 2026
5pm CST Jan 24, 2026-6pm CST Jan 31, 2026
 
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Additional Resources

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