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.

A Few Clouds

67°F

19°C

Humidity 66%
Wind Speed W 14 mph
Barometer 29.71 in (1006.0 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 11 Nov 1:54 pm CST
Extended Forecast for

Niantic IL

  • Veterans Day

    Veterans Day: Mostly cloudy, with a high near 67. West wind 14 to 17 mph becoming north northwest. Winds could gust as high as 25 mph.

    High: 67 °F

    Mostly Cloudy

  • Tonight

    Tonight: Increasing clouds, with a low around 39. North northwest wind 7 to 17 mph, with gusts as high as 24 mph.

    Low: 39 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A slight chance of rain between 11am and 4pm. Mostly cloudy, with a high near 48. Breezy, with a north northwest wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 20%.

    High: 48 °F

    Slight Chance
    Rain and
    Breezy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 29. North northwest wind 9 to 15 mph, with gusts as high as 23 mph.

    Low: 29 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 44. North northwest wind 9 to 14 mph, with gusts as high as 20 mph.

    High: 44 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 24. North northwest wind 3 to 8 mph.

    Low: 24 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 46. North northwest wind 3 to 5 mph.

    High: 46 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

Detailed Forecast

Veterans Day
Mostly cloudy, with a high near 67. West wind 14 to 17 mph becoming north northwest. Winds could gust as high as 25 mph.
Tonight
Increasing clouds, with a low around 39. North northwest wind 7 to 17 mph, with gusts as high as 24 mph.
Thursday
A slight chance of rain between 11am and 4pm. Mostly cloudy, with a high near 48. Breezy, with a north northwest wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 29. North northwest wind 9 to 15 mph, with gusts as high as 23 mph.
Friday
Mostly sunny, with a high near 44. North northwest wind 9 to 14 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 24. North northwest wind 3 to 8 mph.
Saturday
Sunny, with a high near 46. North northwest wind 3 to 5 mph.
Saturday Night
Mostly clear, with a low around 24.
Sunday
Sunny, with a high near 49.
Sunday Night
Mostly clear, with a low around 27.
Monday
Sunny, with a high near 50.
Monday Night
Mostly clear, with a low around 28.
Tuesday
Sunny, with a high near 52.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Niantic IL
 39.87°N 89.17°W (Elev. 600 ft)
Last Update:
1:21 pm CST Nov 11, 2026
Forecast Valid:
2pm CST Nov 11, 2026-6pm CST Nov 17, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation