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

25°F

-4°C

Humidity 72%
Wind Speed NE 8 mph
Barometer 30.39 in (1030.1 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 4 Feb 11:54 am CST
Extended Forecast for

2 Miles ENE Harristown IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 28. North wind 6 to 8 mph.

    High: 28 °F

    Mostly Cloudy

  • Tonight

    Tonight: Partly cloudy, with a low around 11. Wind chill values between 4 and 9. Calm wind becoming southwest around 5 mph after midnight.

    Low: 11 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 32. Wind chill values between 3 and 13. South southwest wind 6 to 13 mph, with gusts as high as 18 mph.

    High: 32 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 25. South southwest wind 8 to 11 mph becoming west after midnight. Winds could gust as high as 18 mph.

    Low: 25 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 42. Northwest wind 13 to 16 mph, with gusts as high as 25 mph.

    High: 42 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 19. Northwest wind 6 to 13 mph becoming north northeast after midnight. Winds could gust as high as 20 mph.

    Low: 19 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 33. North northeast wind 6 to 9 mph becoming southeast in the afternoon.

    High: 33 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 41.

    High: 41 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 28. North wind 6 to 8 mph.
Tonight
Partly cloudy, with a low around 11. Wind chill values between 4 and 9. Calm wind becoming southwest around 5 mph after midnight.
Thursday
Mostly cloudy, with a high near 32. Wind chill values between 3 and 13. South southwest wind 6 to 13 mph, with gusts as high as 18 mph.
Thursday Night
Partly cloudy, with a low around 25. South southwest wind 8 to 11 mph becoming west after midnight. Winds could gust as high as 18 mph.
Friday
Partly sunny, with a high near 42. Northwest wind 13 to 16 mph, with gusts as high as 25 mph.
Friday Night
Partly cloudy, with a low around 19. Northwest wind 6 to 13 mph becoming north northeast after midnight. Winds could gust as high as 20 mph.
Saturday
Mostly sunny, with a high near 33. North northeast wind 6 to 9 mph becoming southeast in the afternoon.
Saturday Night
Mostly cloudy, with a low around 25.
Sunday
Partly sunny, with a high near 41.
Sunday Night
Partly cloudy, with a low around 23.
Monday
Mostly sunny, with a high near 44.
Monday Night
Partly cloudy, with a low around 31.
Tuesday
Partly sunny, with a high near 52.
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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:
11:37 am CST Feb 4, 2026
Forecast Valid:
12pm CST Feb 4, 2026-6pm CST Feb 10, 2026
 
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Additional Resources

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