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

64°F

18°C

Humidity 90%
Wind Speed SW 14 mph
Barometer 29.87 in (1011.3 mb)
Dewpoint 61°F (16°C)
Visibility 7.00 mi
Last update 10 Mar 8:54 am CDT
Extended Forecast for

4 Miles S Niantic IL

  • Today

    Today: A slight chance of showers and thunderstorms between 4pm and 5pm, then a slight chance of showers after 5pm. Mostly sunny, with a high near 78. South southwest wind 13 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.

    High: 78 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am. Low around 52. Breezy, with a south southwest wind 17 to 20 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 52 °F

    Chance
    T-storms and
    Breezy then
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 1pm, then a chance of showers. Temperature falling to around 45 by 5pm. Breezy, with a west southwest wind 17 to 23 mph becoming northwest in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 62 °F⇓

    Breezy.
    T-storms then
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 30. Blustery, with a northwest wind 15 to 20 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 29 mph.

    Low: 30 °F

    Mostly Cloudy
    and Blustery
    then Partly
    Cloudy

  • Thursday

    Thursday: Increasing clouds, with a high near 50. Northwest wind 6 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.

    High: 50 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 42. Breezy, with a south wind 13 to 18 mph increasing to 20 to 25 mph after midnight. Winds could gust as high as 36 mph.

    Low: 42 °F

    Mostly Cloudy
    and Breezy

  • Friday

    Friday: Mostly cloudy, with a high near 57. Breezy, with a southwest wind 17 to 22 mph becoming west northwest in the afternoon. Winds could gust as high as 32 mph.

    High: 57 °F

    Mostly Cloudy
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 61.

    High: 61 °F

    Mostly Cloudy

Detailed Forecast

Today
A slight chance of showers and thunderstorms between 4pm and 5pm, then a slight chance of showers after 5pm. Mostly sunny, with a high near 78. South southwest wind 13 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.
Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am. Low around 52. Breezy, with a south southwest wind 17 to 20 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Showers and possibly a thunderstorm before 1pm, then a chance of showers. Temperature falling to around 45 by 5pm. Breezy, with a west southwest wind 17 to 23 mph becoming northwest in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Wednesday Night
Partly cloudy, with a low around 30. Blustery, with a northwest wind 15 to 20 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 29 mph.
Thursday
Increasing clouds, with a high near 50. Northwest wind 6 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 42. Breezy, with a south wind 13 to 18 mph increasing to 20 to 25 mph after midnight. Winds could gust as high as 36 mph.
Friday
Mostly cloudy, with a high near 57. Breezy, with a southwest wind 17 to 22 mph becoming west northwest in the afternoon. Winds could gust as high as 32 mph.
Friday Night
Mostly cloudy, with a low around 35.
Saturday
Mostly cloudy, with a high near 61.
Saturday Night
Mostly cloudy, with a low around 45.
Sunday
Rain. Mostly cloudy, with a high near 57. Breezy.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 19. Blustery.
Monday
Partly sunny, with a high near 32.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Niantic IL
 39.8°N 89.14°W (Elev. 561 ft)
Last Update:
7:36 am CDT Mar 10, 2026
Forecast Valid:
9am CDT Mar 10, 2026-6pm CDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation