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.

Mostly Cloudy

82°F

28°C

Humidity 49%
Wind Speed S 13 G 20 mph
Barometer 30.04 in (1016.6 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 6 Oct 4:54 pm CDT
Extended Forecast for

Niantic IL

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 85. South wind around 8 mph.

    High: 85 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 63. South wind 5 to 10 mph, with gusts as high as 16 mph.

    Low: 63 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms before 10am. Cloudy, with a high near 71. North wind 6 to 14 mph, with gusts as high as 22 mph.

    High: 71 °F

    Chance
    T-storms then
    Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, then gradually becoming clear, with a low around 44. North wind 6 to 11 mph, with gusts as high as 16 mph.

    Low: 44 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Sunny, with a high near 70. Northeast wind 6 to 11 mph, with gusts as high as 15 mph.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 42. Northeast wind around 8 mph.

    Low: 42 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 69. East wind 7 to 9 mph.

    High: 69 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 85. South wind around 8 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 63. South wind 5 to 10 mph, with gusts as high as 16 mph.
Tuesday
A 40 percent chance of showers and thunderstorms before 10am. Cloudy, with a high near 71. North wind 6 to 14 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly cloudy, then gradually becoming clear, with a low around 44. North wind 6 to 11 mph, with gusts as high as 16 mph.
Wednesday
Sunny, with a high near 70. Northeast wind 6 to 11 mph, with gusts as high as 15 mph.
Wednesday Night
Clear, with a low around 42. Northeast wind around 8 mph.
Thursday
Sunny, with a high near 69. East wind 7 to 9 mph.
Thursday Night
Mostly clear, with a low around 41.
Friday
Sunny, with a high near 73.
Friday Night
Partly cloudy, with a low around 49.
Saturday
Sunny, with a high near 77.
Saturday Night
Mostly clear, with a low around 50.
Sunday
Sunny, with a high near 79.
Sunday Night
Mostly clear, with a low around 55.
Columbus Day
Mostly 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:
4:36 pm CDT Oct 6, 2025
Forecast Valid:
5pm CDT Oct 6, 2025-6pm CDT Oct 13, 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