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

55°F

13°C

Humidity 38%
Wind Speed W 8 mph
Barometer 29.84 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill53°F (12°C)
Last update 5 May 2:59 pm CDT
Extended Forecast for

Lostant IL

  • This Afternoon

    This Afternoon: A 20 percent chance of showers. Cloudy, with a steady temperature around 57. West northwest wind around 10 mph, with gusts as high as 15 mph.

    High: 57 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A 20 percent chance of showers before 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 40. North wind around 5 mph, with gusts as high as 15 mph.

    Low: 40 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 58. West northwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 58 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 39. Northwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 15 mph.

    Low: 39 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 62. West wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 62 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

  • Friday

    Friday: A 40 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 66.

    High: 66 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers. Cloudy, with a steady temperature around 57. West northwest wind around 10 mph, with gusts as high as 15 mph.
Tonight
A 20 percent chance of showers before 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 40. North wind around 5 mph, with gusts as high as 15 mph.
Wednesday
Partly sunny, with a high near 58. West northwest wind 5 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Increasing clouds, with a low around 39. Northwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 15 mph.
Thursday
Mostly sunny, with a high near 62. West wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 47.
Friday
A 40 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 66.
Friday Night
Partly cloudy, with a low around 47.
Saturday
Sunny, with a high near 76.
Saturday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 53.
Sunday
A chance of showers. Partly sunny, with a high near 67.
Sunday Night
Partly cloudy, with a low around 44.
Monday
Sunny, with a high near 68.
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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:
2:56 pm CDT May 5, 2026
Forecast Valid:
3pm CDT May 5, 2026-6pm CDT May 11, 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