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.

Fair

66°F

19°C

Humidity 50%
Wind Speed N 7 mph
Barometer 30.06 in (1017.8 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 10 Nov 12:54 pm CST
Extended Forecast for

Niantic IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 68. Northwest wind around 5 mph becoming calm.

    High: 68 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 43. Light and variable wind.

    Low: 43 °F

    Increasing
    Clouds

  • Veterans Day

    Veterans Day: A slight chance of showers between 10am and 11am. Mostly sunny, with a high near 63. Light and variable wind becoming west northwest 11 to 16 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 20%.

    High: 63 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 39. North northwest wind 10 to 16 mph, with gusts as high as 21 mph.

    Low: 39 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 48. North northwest wind 11 to 17 mph, with gusts as high as 23 mph.

    High: 48 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 29. North northwest wind 7 to 13 mph, with gusts as high as 17 mph.

    Low: 29 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 43. North northwest wind 8 to 13 mph, with gusts as high as 17 mph.

    High: 43 °F

    Sunny

  • Friday Night

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

    Low: 24 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 46.

    High: 46 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 68. Northwest wind around 5 mph becoming calm.
Tonight
Increasing clouds, with a low around 43. Light and variable wind.
Veterans Day
A slight chance of showers between 10am and 11am. Mostly sunny, with a high near 63. Light and variable wind becoming west northwest 11 to 16 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 39. North northwest wind 10 to 16 mph, with gusts as high as 21 mph.
Thursday
Partly sunny, with a high near 48. North northwest wind 11 to 17 mph, with gusts as high as 23 mph.
Thursday Night
Mostly clear, with a low around 29. North northwest wind 7 to 13 mph, with gusts as high as 17 mph.
Friday
Sunny, with a high near 43. North northwest wind 8 to 13 mph, with gusts as high as 17 mph.
Friday Night
Mostly clear, with a low around 24.
Saturday
Sunny, with a high near 46.
Saturday Night
Mostly clear, with a low around 27.
Sunday
Sunny, with a high near 49.
Sunday Night
Partly cloudy, with a low around 31.
Monday
Mostly sunny, with a high near 52.
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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:
1:41 pm CST Nov 10, 2026
Forecast Valid:
1pm CST Nov 10, 2026-6pm CST Nov 16, 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