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

82°F

28°C

Humidity 48%
Wind Speed N 5 mph
Barometer 30.11 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 7 Jul 1:13 pm CDT
Extended Forecast for

Ottawa IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 86. North wind around 5 mph becoming calm.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 66. Calm wind.

    Low: 66 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 87. Calm wind becoming southwest around 5 mph in the morning. Winds could gust as high as 10 mph.

    High: 87 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 70. South southwest wind around 5 mph, with gusts as high as 10 mph.

    Low: 70 °F

    Partly Cloudy

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 87 °F

    Partly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 69. Chance of precipitation is 70%.

    Low: 69 °F

    Showers
    Likely

  • Friday

    Friday: A slight chance of showers, then a chance of showers and thunderstorms after 7am. Mostly cloudy, with a high near 84. Chance of precipitation is 50%.

    High: 84 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 66.

    Low: 66 °F

    Chance
    T-storms

  • Saturday

    Saturday: Partly sunny, with a high near 85.

    High: 85 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 86. North wind around 5 mph becoming calm.
Tonight
Clear, with a low around 66. Calm wind.
Wednesday
Sunny, with a high near 87. Calm wind becoming southwest around 5 mph in the morning. Winds could gust as high as 10 mph.
Wednesday Night
Partly cloudy, with a low around 70. South southwest wind around 5 mph, with gusts as high as 10 mph.
Thursday
A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 69. Chance of precipitation is 70%.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 7am. Mostly cloudy, with a high near 84. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 66.
Saturday
Partly sunny, with a high near 85.
Saturday Night
Partly cloudy, with a low around 66.
Sunday
Sunny, with a high near 86.
Sunday Night
Mostly clear, with a low around 67.
Monday
Sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ottawa IL
 41.35°N 88.85°W
Last Update:
1:21 pm CDT Jul 7, 2026
Forecast Valid:
1pm CDT Jul 7, 2026-6pm CDT Jul 13, 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