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

21°F

-6°C

Humidity 80%
Wind Speed E 5 mph
Barometer 30.21 in
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill14°F (-10°C)
Last update 9 Feb 2:01 am CST
Extended Forecast for

Tonica IL

  • Overnight

    Overnight: Partly cloudy, with a low around 19. East southeast wind around 5 mph, with gusts as high as 15 mph.

    Low: 19 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 44. East wind 5 to 10 mph becoming south southwest in the afternoon.

    High: 44 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a steady temperature around 39. South wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 25 mph.

    Low: 39 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 48. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 48 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 27. North northwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 27 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of snow after noon. Cloudy, with a high near 40.

    High: 40 °F

    Cloudy then
    Chance Snow

  • Thursday Night

    Thursday Night: A chance of snow. Mostly cloudy, with a low around 26.

    Low: 26 °F

    Chance Snow

Detailed Forecast

Overnight
Partly cloudy, with a low around 19. East southeast wind around 5 mph, with gusts as high as 15 mph.
Monday
Partly sunny, with a high near 44. East wind 5 to 10 mph becoming south southwest in the afternoon.
Monday Night
Mostly cloudy, with a steady temperature around 39. South wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 25 mph.
Tuesday
Mostly sunny, with a high near 48. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 27. North northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Wednesday
Mostly sunny, with a high near 42.
Wednesday Night
Mostly cloudy, with a low around 27.
Thursday
A chance of snow after noon. Cloudy, with a high near 40.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 26.
Friday
Partly sunny, with a high near 43.
Friday Night
Mostly cloudy, with a low around 26.
Saturday
A chance of rain. Mostly cloudy, with a high near 43.
Saturday Night
A chance of rain and snow. Mostly cloudy, with a low around 29.
Sunday
A chance of rain and snow. Mostly sunny, with a high near 43.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tonica IL
 41.23°N 89.06°W
Last Update:
1:50 am CST Feb 9, 2026
Forecast Valid:
2am CST Feb 9, 2026-6pm CST Feb 15, 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