National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Light Snow Fog/Mist and Breezy

28°F

-2°C

Humidity 92%
Wind Speed SE 24 G 39 mph
Barometer 30.19 in (1023.2 mb)
Dewpoint 26°F (-3°C)
Visibility 1.00 mi
Wind Chill14°F (-10°C)
Last update 29 Nov 10:54 am CST
Extended Forecast for

Niantic IL

Winter Storm Warning November 29, 11:13am until November 30, 06:00am
Click here for hazard details and duration
Winter Storm Warning
  •  
    Winter Storm Warning November 29, 11:13am until November 30, 06:00am

    NOW until 6:00am Sun

    Winter Storm Warning

  • Today

    High: 35 °F

    Rain/Snow and
    Patchy
    Blowing Snow

  • Tonight

    Tonight: Rain and snow, possibly mixed with sleet before 10pm, then a chance of rain between 10pm and midnight. Low around 24. Breezy, with a south wind 20 to 22 mph becoming west after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 90%. Little or no snow and sleet accumulation expected.

    Low: 24 °F

    Breezy.
    Wintry Mix
    then Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 26. Breezy, with a west northwest wind 13 to 20 mph, with gusts as high as 31 mph.

    High: 26 °F

    Cloudy and
    Breezy then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 15. Northwest wind 5 to 10 mph becoming light and variable in the evening. Winds could gust as high as 17 mph.

    Low: 15 °F

    Mostly Cloudy

  • Monday

    Monday: A 40 percent chance of snow after noon. Cloudy, with a high near 27. Calm wind becoming southeast around 5 mph.

    High: 27 °F

    Cloudy then
    Chance Snow

  • Monday Night

    Monday Night: Snow likely, mainly before midnight. Cloudy, with a low around 16. Calm wind becoming north northwest around 5 mph after midnight. Chance of precipitation is 70%.

    Low: 16 °F

    Snow Likely
    then Chance
    Snow

  • Tuesday

    Tuesday: Partly sunny, with a high near 24. North northwest wind 5 to 7 mph becoming west in the afternoon.

    High: 24 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 13.

    Low: 13 °F

    Mostly Cloudy

Detailed Forecast

Today
Snow before 5pm, then snow, possibly mixed with rain. The snow could be heavy at times. Patchy blowing snow before 3pm. High near 35. Breezy, with a southeast wind around 22 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. Total daytime snow accumulation of 5 to 9 inches possible.
Tonight
Rain and snow, possibly mixed with sleet before 10pm, then a chance of rain between 10pm and midnight. Low around 24. Breezy, with a south wind 20 to 22 mph becoming west after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 90%. Little or no snow and sleet accumulation expected.
Sunday
Mostly cloudy, with a high near 26. Breezy, with a west northwest wind 13 to 20 mph, with gusts as high as 31 mph.
Sunday Night
Mostly cloudy, with a low around 15. Northwest wind 5 to 10 mph becoming light and variable in the evening. Winds could gust as high as 17 mph.
Monday
A 40 percent chance of snow after noon. Cloudy, with a high near 27. Calm wind becoming southeast around 5 mph.
Monday Night
Snow likely, mainly before midnight. Cloudy, with a low around 16. Calm wind becoming north northwest around 5 mph after midnight. Chance of precipitation is 70%.
Tuesday
Partly sunny, with a high near 24. North northwest wind 5 to 7 mph becoming west in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 13.
Wednesday
Partly sunny, with a high near 32.
Wednesday Night
Mostly cloudy, with a low around 8.
Thursday
Mostly sunny, with a high near 20.
Thursday Night
Mostly cloudy, with a low around 7.
Friday
Mostly cloudy, with a high near 32.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Niantic IL
 39.85°N 89.17°W (Elev. 600 ft)
Last Update:
9:47 am CST Nov 29, 2025
Forecast Valid:
11am CST Nov 29, 2025-6pm CST Dec 5, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation