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Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Overcast and Breezy

55°F

13°C

Humidity 77%
Wind Speed S 23 G 35 mph
Barometer 29.62 in (1002.8 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 18 Feb 12:54 am CST
Extended Forecast for

2 Miles ENE Harristown IL

  • Overnight

    Overnight: A chance of showers before 4am, then a chance of sprinkles between 4am and 5am. Cloudy, then gradually becoming partly cloudy, with a low around 52. Breezy, with a south wind 18 to 20 mph, with gusts as high as 36 mph. Chance of precipitation is 30%.

    Low: 52 °F

    Chance
    Showers and
    Breezy

  • Wednesday

    Wednesday: Sunny, with a high near 67. West wind 10 to 17 mph, with gusts as high as 30 mph.

    High: 67 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 46. Southwest wind 6 to 8 mph becoming south southeast after midnight.

    Low: 46 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 66. South southeast wind 8 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 66 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before midnight. Partly cloudy, with a low around 34. Breezy, with a south southwest wind 13 to 22 mph becoming west after midnight. Winds could gust as high as 30 mph.

    Low: 34 °F

    Chance
    Showers then
    Partly Cloudy
    and Breezy

  • Friday

    Friday: Mostly sunny, with a high near 44. Breezy, with a west wind 13 to 22 mph, with gusts as high as 31 mph.

    High: 44 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 25. Northwest wind 7 to 10 mph, with gusts as high as 15 mph.

    Low: 25 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of snow after noon. Mostly sunny, with a high near 38.

    High: 38 °F

    Partly Sunny
    then Chance
    Snow

  • Saturday Night

    Saturday Night: A 30 percent chance of snow before midnight. Partly cloudy, with a low around 21.

    Low: 21 °F

    Chance Snow
    then Partly
    Cloudy

Detailed Forecast

Overnight
A chance of showers before 4am, then a chance of sprinkles between 4am and 5am. Cloudy, then gradually becoming partly cloudy, with a low around 52. Breezy, with a south wind 18 to 20 mph, with gusts as high as 36 mph. Chance of precipitation is 30%.
Wednesday
Sunny, with a high near 67. West wind 10 to 17 mph, with gusts as high as 30 mph.
Wednesday Night
Increasing clouds, with a low around 46. Southwest wind 6 to 8 mph becoming south southeast after midnight.
Thursday
A chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 66. South southeast wind 8 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A 30 percent chance of showers before midnight. Partly cloudy, with a low around 34. Breezy, with a south southwest wind 13 to 22 mph becoming west after midnight. Winds could gust as high as 30 mph.
Friday
Mostly sunny, with a high near 44. Breezy, with a west wind 13 to 22 mph, with gusts as high as 31 mph.
Friday Night
Mostly clear, with a low around 25. Northwest wind 7 to 10 mph, with gusts as high as 15 mph.
Saturday
A 30 percent chance of snow after noon. Mostly sunny, with a high near 38.
Saturday Night
A 30 percent chance of snow before midnight. Partly cloudy, with a low around 21.
Sunday
Mostly sunny, with a high near 33.
Sunday Night
Mostly clear, with a low around 16.
Monday
Sunny, with a high near 33.
Monday Night
Mostly clear, with a low around 17.
Tuesday
Mostly sunny, with a high near 41.
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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:
1:31 am CST Feb 18, 2026
Forecast Valid:
1am CST Feb 18, 2026-6pm CST Feb 24, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation