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

46°F

8°C

Humidity 77%
Wind Speed NE 3 mph
Barometer 29.96 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 19 Mar 11:55 pm CDT
Extended Forecast for

Lostant IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 48. Southwest wind around 5 mph, with gusts as high as 10 mph.

    Low: 48 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 70. West southwest wind 10 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 70 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 42. North wind 5 to 10 mph becoming east after midnight.

    Low: 42 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 71. Southeast wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.

    High: 71 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 55. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 55 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 69. Breezy.

    High: 69 °F

    Partly Sunny
    then Mostly
    Cloudy and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 33. Breezy.

    Low: 33 °F

    Mostly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Monday

    Monday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 48. Southwest wind around 5 mph, with gusts as high as 10 mph.
Friday
Mostly sunny, with a high near 70. West southwest wind 10 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Mostly cloudy, with a low around 42. North wind 5 to 10 mph becoming east after midnight.
Saturday
Sunny, with a high near 71. Southeast wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.
Saturday Night
Mostly clear, with a low around 55. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, with a high near 69. Breezy.
Sunday Night
Partly cloudy, with a low around 33. Breezy.
Monday
Sunny, with a high near 50.
Monday Night
Mostly cloudy, with a low around 34.
Tuesday
Mostly cloudy, with a high near 57.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
Mostly cloudy, with a high near 59.
Wednesday Night
Mostly cloudy, with a low around 46.
Thursday
A chance of showers. Partly sunny, with a high near 67. Breezy.
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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:
9:11 pm CDT Mar 19, 2026
Forecast Valid:
12am CDT Mar 20, 2026-6pm CDT Mar 26, 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