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

58°F

14°C

Humidity 75%
Wind Speed E 6 mph
Barometer 30.16 in (1021.0 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 25 May 2:54 am CDT
Extended Forecast for

Niantic IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 55. East wind around 6 mph.

    Low: 55 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 40 percent chance of showers, mainly between 11am and 5pm. Cloudy, with a high near 66. East northeast wind 7 to 13 mph, with gusts as high as 18 mph.

    High: 66 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Cloudy, then gradually becoming partly cloudy, with a low around 50. East northeast wind 9 to 11 mph, with gusts as high as 17 mph.

    Low: 50 °F

    Decreasing
    Clouds

  • Memorial Day

    Memorial Day: Partly sunny, with a high near 70. East wind 10 to 14 mph, with gusts as high as 20 mph.

    High: 70 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 56. East wind around 11 mph, with gusts as high as 18 mph.

    Low: 56 °F

    Mostly Cloudy
    then Chance
    Showers

  • Tuesday

    Tuesday: A 50 percent chance of showers. Mostly cloudy, with a high near 68. East wind 10 to 13 mph, with gusts as high as 20 mph.

    High: 68 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 55. North northeast wind 7 to 10 mph becoming west northwest after midnight. Winds could gust as high as 15 mph.

    Low: 55 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Partly sunny, with a high near 71.

    High: 71 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 55. East wind around 6 mph.
Sunday
A 40 percent chance of showers, mainly between 11am and 5pm. Cloudy, with a high near 66. East northeast wind 7 to 13 mph, with gusts as high as 18 mph.
Sunday Night
Cloudy, then gradually becoming partly cloudy, with a low around 50. East northeast wind 9 to 11 mph, with gusts as high as 17 mph.
Memorial Day
Partly sunny, with a high near 70. East wind 10 to 14 mph, with gusts as high as 20 mph.
Monday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 56. East wind around 11 mph, with gusts as high as 18 mph.
Tuesday
A 50 percent chance of showers. Mostly cloudy, with a high near 68. East wind 10 to 13 mph, with gusts as high as 20 mph.
Tuesday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 55. North northeast wind 7 to 10 mph becoming west northwest after midnight. Winds could gust as high as 15 mph.
Wednesday
Partly sunny, with a high near 71.
Wednesday Night
Partly cloudy, with a low around 54.
Thursday
Partly sunny, with a high near 73.
Thursday Night
Partly cloudy, with a low around 55.
Friday
Mostly sunny, with a high near 77.
Friday Night
Mostly clear, with a low around 58.
Saturday
Sunny, with a high near 80.
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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:
2:40 am CDT May 25, 2025
Forecast Valid:
3am CDT May 25, 2025-6pm CDT May 31, 2025
 
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