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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Ottawa IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 66. Northeast wind around 10 mph.

    High: 66 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 57. East northeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 57 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms likely before 10am, then showers between 10am and 4pm, then showers likely and possibly a thunderstorm after 4pm. High near 63. East wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 63 °F

    Showers

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 10pm, then a chance of showers. Mostly cloudy, with a low around 48. Breezy, with an east wind 10 to 15 mph becoming west northwest 15 to 20 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 60%.

    Low: 48 °F

    Showers
    Likely and
    Breezy

  • Friday

    Friday: A 50 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 55. Breezy, with a northwest wind around 20 mph, with gusts as high as 30 mph.

    High: 55 °F

    Breezy.
    Slight Chance
    Showers then
    Chance
    Showers

  • Friday Night

    Friday Night: Areas of frost after 5am. Otherwise, partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy
    then Areas
    Frost

  • Saturday

    Saturday: Areas of frost before 8am. Otherwise, sunny, with a high near 58.

    High: 58 °F

    Areas Frost
    then Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 39.

    Low: 39 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 66. Northeast wind around 10 mph.
Tonight
A 20 percent chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 57. East northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Thursday
Showers and thunderstorms likely before 10am, then showers between 10am and 4pm, then showers likely and possibly a thunderstorm after 4pm. High near 63. East wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Showers and thunderstorms likely before 10pm, then a chance of showers. Mostly cloudy, with a low around 48. Breezy, with an east wind 10 to 15 mph becoming west northwest 15 to 20 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 60%.
Friday
A 50 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 55. Breezy, with a northwest wind around 20 mph, with gusts as high as 30 mph.
Friday Night
Areas of frost after 5am. Otherwise, partly cloudy, with a low around 36.
Saturday
Areas of frost before 8am. Otherwise, sunny, with a high near 58.
Saturday Night
Clear, with a low around 39.
Sunday
Sunny, with a high near 66.
Sunday Night
Mostly clear, with a low around 42.
Monday
Mostly sunny, with a high near 70.
Monday Night
Partly cloudy, with a low around 45.
Tuesday
Sunny, with a high near 72.
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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:
3:11 pm CDT Oct 14, 2026
Forecast Valid:
3pm CDT Oct 14, 2026-6pm CDT Oct 20, 2026
 
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