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.

Mostly Cloudy

58°F

14°C

Humidity 83%
Wind Speed NE 7 mph
Barometer 30.24 in
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 15 Oct 7:15 am CDT
Extended Forecast for

Ottawa IL

  • Today

    Today: Isolated showers before noon. Cloudy, with a high near 65. East northeast wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 65 °F

    Isolated
    Showers then
    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 54. East northeast wind 5 to 10 mph.

    Low: 54 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 73. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 73 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 55. South southeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 55 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 76. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 76 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 60.

    Low: 60 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 72. Chance of precipitation is 70%.

    High: 72 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers before 1pm. Mostly sunny, with a high near 61.

    High: 61 °F

    Chance
    Showers

Detailed Forecast

Today
Isolated showers before noon. Cloudy, with a high near 65. East northeast wind 5 to 10 mph. Chance of precipitation is 20%.
Tonight
Mostly cloudy, with a low around 54. East northeast wind 5 to 10 mph.
Thursday
Mostly sunny, with a high near 73. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.
Thursday Night
Partly cloudy, with a low around 55. South southeast wind 5 to 10 mph, with gusts as high as 15 mph.
Friday
Partly sunny, with a high near 76. South wind 10 to 15 mph, with gusts as high as 20 mph.
Friday Night
A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 60.
Saturday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 72. Chance of precipitation is 70%.
Saturday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 47.
Sunday
A chance of showers before 1pm. Mostly sunny, with a high near 61.
Sunday Night
Mostly clear, with a low around 40.
Monday
Sunny, with a high near 66.
Monday Night
Mostly clear, with a low around 46.
Tuesday
Mostly sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ottawa IL
 41.35°N 88.85°W
Last Update:
4:11 am CDT Oct 15, 2025
Forecast Valid:
7am CDT Oct 15, 2025-6pm CDT Oct 21, 2025
 
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