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

Hazardous Weather Conditions

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Fair

5°F

-15°C

Humidity 74%
Wind Speed E 3 mph
Barometer 30.28 in
Dewpoint -2°F (-19°C)
Visibility 10.00 mi
Last update 4 Dec 6:35 pm CST
Extended Forecast for

Ottawa IL

  • Tonight

    Tonight: Patchy freezing fog after 10pm. Increasing clouds, with a low around -5. Wind chill values as low as -14. Calm wind becoming south around 5 mph after midnight. Winds could gust as high as 10 mph.

    Low: -5 °F

    Patchy
    Freezing Fog

  • Friday

    Friday: Patchy freezing fog before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 30. Wind chill values as low as -6. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 30 °F

    Patchy
    Freezing Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Patchy snow and freezing rain before midnight. Mostly cloudy, with a steady temperature around 29. South southwest wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.

    Low: 29 °F

    Patchy Wintry
    Mix then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 28. West northwest wind around 5 mph becoming calm in the afternoon. Winds could gust as high as 10 mph.

    High: 28 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Snow likely, mainly after midnight. Cloudy, with a low around 19. Calm wind becoming northeast around 5 mph after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 60%.

    Low: 19 °F

    Slight Chance
    Snow then
    Snow Likely

  • Sunday

    Sunday: A 40 percent chance of snow before noon. Partly sunny, with a high near 24.

    High: 24 °F

    Chance Snow
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 2.

    Low: 2 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 21.

    High: 21 °F

    Partly Sunny

  • Monday Night

    Monday Night: A chance of snow. Mostly cloudy, with a low around 14.

    Low: 14 °F

    Chance Snow

Detailed Forecast

Tonight
Patchy freezing fog after 10pm. Increasing clouds, with a low around -5. Wind chill values as low as -14. Calm wind becoming south around 5 mph after midnight. Winds could gust as high as 10 mph.
Friday
Patchy freezing fog before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 30. Wind chill values as low as -6. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Patchy snow and freezing rain before midnight. Mostly cloudy, with a steady temperature around 29. South southwest wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 28. West northwest wind around 5 mph becoming calm in the afternoon. Winds could gust as high as 10 mph.
Saturday Night
Snow likely, mainly after midnight. Cloudy, with a low around 19. Calm wind becoming northeast around 5 mph after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 60%.
Sunday
A 40 percent chance of snow before noon. Partly sunny, with a high near 24.
Sunday Night
Mostly cloudy, with a low around 2.
Monday
Partly sunny, with a high near 21.
Monday Night
A chance of snow. Mostly cloudy, with a low around 14.
Tuesday
Mostly cloudy, with a high near 32.
Tuesday Night
A chance of snow. Cloudy, with a low around 23.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 34.
Wednesday Night
Mostly cloudy, with a low around 11.
Thursday
Partly sunny, with a high near 23.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ottawa IL
 41.35°N 88.85°W
Last Update:
6:11 pm CST Dec 4, 2025
Forecast Valid:
6pm CST Dec 4, 2025-6pm CST Dec 11, 2025
 
Forecast Discussion
 
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Additional Resources

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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