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

Above Average Temperatures in the West; Winter Weather Returns to the Upper Midwest and Great Lakes

Well above average temperatures will continue across the West this week, potentially breaking some daily high temperature records. A storm system dropping south out of Canada will bring a wintry mix to the Upper Midwest and Great Lakes Tuesday, pushing into the Central Appalachians and interior Northeast on Wednesday. Read More >

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Fair

N/A

Humidity NA
Wind Speed S 9 mph
Barometer 29.88 in
Dewpoint N/A
Visibility 10.00 mi
Last update 13 Jan 2:30 am CST
Extended Forecast for

Mark IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 34. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 34 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 48. West wind around 15 mph, with gusts as high as 30 mph.

    High: 48 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 27. Blustery, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 27 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Blustery

  • Wednesday

    Wednesday: Partly sunny, with a high near 29. Blustery, with a north wind 15 to 20 mph, with gusts as high as 35 mph.

    High: 29 °F

    Partly Sunny
    and Blustery

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 14.

    Low: 14 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 27.

    High: 27 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Snow likely. Mostly cloudy, with a low around 24. Chance of precipitation is 70%.

    Low: 24 °F

    Snow Likely

  • Friday

    Friday: A 50 percent chance of snow. Mostly cloudy, with a high near 35.

    High: 35 °F

    Chance Snow

  • Friday Night

    Friday Night: A 30 percent chance of snow. Mostly cloudy, with a low around 14.

    Low: 14 °F

    Chance Snow

Detailed Forecast

Overnight
Mostly cloudy, with a low around 34. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Mostly cloudy, with a high near 48. West wind around 15 mph, with gusts as high as 30 mph.
Tuesday Night
Mostly cloudy, with a low around 27. Blustery, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Wednesday
Partly sunny, with a high near 29. Blustery, with a north wind 15 to 20 mph, with gusts as high as 35 mph.
Wednesday Night
Mostly clear, with a low around 14.
Thursday
Mostly sunny, with a high near 27.
Thursday Night
Snow likely. Mostly cloudy, with a low around 24. Chance of precipitation is 70%.
Friday
A 50 percent chance of snow. Mostly cloudy, with a high near 35.
Friday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 14.
Saturday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 20.
Saturday Night
Mostly cloudy, with a low around 6.
Sunday
Partly sunny, with a high near 17.
Sunday Night
Mostly cloudy, with a low around 6.
M.L.King Day
Mostly sunny, with a high near 21.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mark IL
 41.26°N 89.26°W (Elev. 699 ft)
Last Update:
2:56 am CST Jan 13, 2026
Forecast Valid:
3am CST Jan 13, 2026-6pm CST Jan 19, 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