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

  • Overnight

    Overnight: A 40 percent chance of showers and thunderstorms. Cloudy, with a low around 64. North northwest wind around 5 mph.

    Low: 64 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 10am. Mostly cloudy, with a high near 66. Northeast wind 5 to 10 mph. Chance of precipitation is 30%.

    High: 66 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain after 4am. Mostly cloudy, with a low around 57. Northeast wind around 10 mph, with gusts as high as 15 mph.

    Low: 57 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday

    Thursday: Rain, with thunderstorms also possible after 1pm. High near 64. East wind 5 to 10 mph. Chance of precipitation is 100%.

    High: 64 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely and possibly a thunderstorm before 1am. Mostly cloudy, with a low around 48. West southwest wind 5 to 10 mph becoming northwest 10 to 15 mph after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.

    Low: 48 °F

    Rain Likely

  • Friday

    Friday: A 20 percent chance of rain before 1pm. Partly sunny, with a high near 56. Breezy.

    High: 56 °F

    Slight Chance
    Rain and
    Breezy

  • Friday Night

    Friday Night: Areas of frost after 4am. Otherwise, mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear
    then Areas
    Frost

  • Saturday

    Saturday: Areas of frost before 9am. Otherwise, sunny, with a high near 56.

    High: 56 °F

    Areas Frost
    then Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 40.

    Low: 40 °F

    Clear

Detailed Forecast

Overnight
A 40 percent chance of showers and thunderstorms. Cloudy, with a low around 64. North northwest wind around 5 mph.
Wednesday
A chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 10am. Mostly cloudy, with a high near 66. Northeast wind 5 to 10 mph. Chance of precipitation is 30%.
Wednesday Night
A 40 percent chance of rain after 4am. Mostly cloudy, with a low around 57. Northeast wind around 10 mph, with gusts as high as 15 mph.
Thursday
Rain, with thunderstorms also possible after 1pm. High near 64. East wind 5 to 10 mph. Chance of precipitation is 100%.
Thursday Night
Rain likely and possibly a thunderstorm before 1am. Mostly cloudy, with a low around 48. West southwest wind 5 to 10 mph becoming northwest 10 to 15 mph after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.
Friday
A 20 percent chance of rain before 1pm. Partly sunny, with a high near 56. Breezy.
Friday Night
Areas of frost after 4am. Otherwise, mostly clear, with a low around 35.
Saturday
Areas of frost before 9am. Otherwise, sunny, with a high near 56.
Saturday Night
Clear, with a low around 40.
Sunday
Sunny, with a high near 68.
Sunday Night
Partly cloudy, with a low around 48.
Monday
Partly sunny, with a high near 70.
Monday Night
Partly cloudy, with a low around 48.
Tuesday
Mostly sunny, with a high near 74.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ottawa IL
 41.35°N 88.85°W
Last Update:
2:41 am CDT Oct 14, 2026
Forecast Valid:
4am CDT Oct 14, 2026-6pm CDT Oct 20, 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