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

N/A

Humidity NA
Wind Speed W 13 G 17 mph
Barometer 29.77 in
Dewpoint N/A
Visibility 10.00 mi
Last update 24 Apr 3:20 pm CDT
Extended Forecast for

Ottawa IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 72. Northwest wind around 15 mph.

    High: 72 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 48. North wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 48 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 71. Northeast wind 10 to 15 mph.

    High: 71 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 45. East northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 45 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 72. East wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 72 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

  • Monday

    Monday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 74. Breezy. Chance of precipitation is 70%.

    High: 74 °F

    Breezy.
    Chance
    Showers then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 1am. Mostly cloudy, with a low around 52. Breezy.

    Low: 52 °F

    Showers and
    Breezy

  • Tuesday

    Tuesday: Partly sunny, with a high near 64. Breezy.

    High: 64 °F

    Partly Sunny
    and Breezy
    then Mostly
    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 72. Northwest wind around 15 mph.
Tonight
Partly cloudy, with a low around 48. North wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday
Sunny, with a high near 71. Northeast wind 10 to 15 mph.
Saturday Night
Partly cloudy, with a low around 45. East northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny, with a high near 72. East wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 54.
Monday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 74. Breezy. Chance of precipitation is 70%.
Monday Night
Showers and possibly a thunderstorm before 1am. Mostly cloudy, with a low around 52. Breezy.
Tuesday
Partly sunny, with a high near 64. Breezy.
Tuesday Night
Partly cloudy, with a low around 45.
Wednesday
Mostly sunny, with a high near 64.
Wednesday Night
Partly cloudy, with a low around 44.
Thursday
Mostly sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ottawa IL
 41.35°N 88.85°W
Last Update:
2:45 pm CDT Apr 24, 2026
Forecast Valid:
3pm CDT Apr 24, 2026-6pm CDT Apr 30, 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