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.

Mostly Cloudy

N/A

Humidity NA
Wind Speed N 16 G 23 mph
Barometer 30.22 in
Dewpoint N/A
Visibility 10.00 mi
Last update 16 Oct 4:20 pm CDT
Extended Forecast for

Ottawa IL

Frost Advisory October 17, 05:00am until October 17, 08:00am
Click here for hazard details and duration
...

  • This Afternoon

    This Afternoon: Scattered showers, mainly before 5pm. Mostly cloudy, with a high near 54. Breezy, with a north wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    High: 54 °F

    Scattered
    Showers and
    Breezy

  • Tonight

    Tonight: Patchy frost after 5am. Otherwise, mostly cloudy, then gradually becoming clear, with a low around 35. North wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 35 °F

    Partly Cloudy
    then Patchy
    Frost

  • Saturday

    Saturday: Patchy frost before 8am. Otherwise, sunny, with a high near 58. North northwest wind around 5 mph becoming southwest in the afternoon.

    High: 58 °F

    Patchy Frost
    then Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 38. South wind around 5 mph, with gusts as high as 10 mph.

    Low: 38 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 65. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 65 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 39.

    Low: 39 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Scattered showers, mainly before 5pm. Mostly cloudy, with a high near 54. Breezy, with a north wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Tonight
Patchy frost after 5am. Otherwise, mostly cloudy, then gradually becoming clear, with a low around 35. North wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday
Patchy frost before 8am. Otherwise, sunny, with a high near 58. North northwest wind around 5 mph becoming southwest in the afternoon.
Saturday Night
Clear, with a low around 38. South wind around 5 mph, with gusts as high as 10 mph.
Sunday
Sunny, with a high near 65. South wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 39.
Monday
Sunny, with a high near 69.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
Mostly sunny, with a high near 72.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Sunny, with a high near 73.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 75.
Thursday Night
Partly cloudy, with a low around 51.
Friday
Mostly sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ottawa IL
 41.33°N 88.82°W
Last Update:
4:31 pm CDT Oct 16, 2026
Forecast Valid:
4pm CDT Oct 16, 2026-6pm CDT Oct 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation