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.

Overcast

43°F

6°C

Humidity 70%
Wind Speed SW 20 G 26 mph
Barometer 29.34 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 10 Dec 12:15 am CST
Extended Forecast for

Ottawa IL

  • Overnight

    Overnight: A 50 percent chance of rain. Cloudy, with a low around 31. Breezy, with a west wind around 20 mph, with gusts as high as 35 mph.

    Low: 31 °F

    Chance Rain
    and Breezy

  • Wednesday

    Wednesday: Snow, mainly before 11am. Temperature falling to around 27 by 5pm. Breezy, with a north northwest wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 33 °F⇓

    Breezy. Snow
    then Slight
    Chance Snow

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 15. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 15 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of snow after noon. Partly sunny, with a high near 24. West northwest wind around 5 mph becoming south in the afternoon. Winds could gust as high as 10 mph.

    High: 24 °F

    Mostly Sunny
    then Slight
    Chance Snow

  • Thursday Night

    Thursday Night: Snow likely. Cloudy, with a low around 22. South southeast wind around 5 mph becoming northeast after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 60%.

    Low: 22 °F

    Snow Likely

  • Friday

    Friday: A 40 percent chance of snow. Mostly cloudy, with a high near 27.

    High: 27 °F

    Chance Snow

  • Friday Night

    Friday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 8.

    Low: 8 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Saturday

    Saturday: Snow likely, mainly after noon. Mostly cloudy, with a high near 12.

    High: 12 °F

    Snow Likely

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around -7.

    Low: -7 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 50 percent chance of rain. Cloudy, with a low around 31. Breezy, with a west wind around 20 mph, with gusts as high as 35 mph.
Wednesday
Snow, mainly before 11am. Temperature falling to around 27 by 5pm. Breezy, with a north northwest wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Wednesday Night
A 20 percent chance of snow before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 15. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday
A 20 percent chance of snow after noon. Partly sunny, with a high near 24. West northwest wind around 5 mph becoming south in the afternoon. Winds could gust as high as 10 mph.
Thursday Night
Snow likely. Cloudy, with a low around 22. South southeast wind around 5 mph becoming northeast after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 60%.
Friday
A 40 percent chance of snow. Mostly cloudy, with a high near 27.
Friday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 8.
Saturday
Snow likely, mainly after noon. Mostly cloudy, with a high near 12.
Saturday Night
Partly cloudy, with a low around -7.
Sunday
Sunny and cold, with a high near 5.
Sunday Night
Partly cloudy, with a low around -5.
Monday
Partly sunny, with a high near 21.
Monday Night
Mostly cloudy, with a low around 10.
Tuesday
Partly sunny, with a high near 26.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ottawa IL
 41.35°N 88.85°W
Last Update:
12:01 am CST Dec 10, 2025
Forecast Valid:
12am CST Dec 10, 2025-6pm CST Dec 16, 2025
 
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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