National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Fair

64°F

18°C

Humidity 65%
Wind Speed SE 10 mph
Barometer 30.03 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 16 Oct 10:35 pm CDT
Extended Forecast for

Lostant IL

  • Tonight

    Tonight: Partly cloudy, with a low around 58. South southeast wind around 10 mph.

    Low: 58 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 78. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 78 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 62. South wind 10 to 15 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Partly Cloudy
    then Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 74. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    High: 74 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 4am, then showers likely. Low around 49. South southwest wind 10 to 15 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 80%.

    Low: 49 °F

    Showers

  • Sunday

    Sunday: A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 60. Breezy.

    High: 60 °F

    Slight Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Clear, with a low around 43.

    Low: 43 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Monday Night

    Monday Night: A chance of showers. Partly cloudy, with a low around 46.

    Low: 46 °F

    Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 58. South southeast wind around 10 mph.
Friday
Mostly sunny, with a high near 78. South wind 10 to 15 mph, with gusts as high as 25 mph.
Friday Night
Showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 62. South wind 10 to 15 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers and possibly a thunderstorm. High near 74. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Saturday Night
Showers and possibly a thunderstorm before 4am, then showers likely. Low around 49. South southwest wind 10 to 15 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 80%.
Sunday
A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 60. Breezy.
Sunday Night
Clear, with a low around 43.
Monday
Sunny, with a high near 68.
Monday Night
A chance of showers. Partly cloudy, with a low around 46.
Tuesday
A chance of showers before 1pm. Mostly sunny, with a high near 58.
Tuesday Night
Mostly clear, with a low around 38.
Wednesday
Sunny, with a high near 59.
Wednesday Night
Partly cloudy, with a low around 42.
Thursday
Mostly sunny, with a high near 60.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lostant IL
 41.14°N 89.07°W
Last Update:
9:16 pm CDT Oct 16, 2025
Forecast Valid:
10pm CDT Oct 16, 2025-6pm CDT Oct 23, 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