National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Partly Cloudy

50°F

10°C

Humidity 50%
Wind Speed S 14 mph
Barometer 30.20 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 29 Mar 9:15 am CDT
Extended Forecast for

Ottawa IL

  • Today

    Today: Partly sunny, with a high near 65. South southwest wind around 15 mph, with gusts as high as 25 mph.

    High: 65 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 51. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 51 °F

    Decreasing
    Clouds

  • Monday

    Monday: Sunny, with a high near 79. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 79 °F

    Sunny

  • Monday Night

    Monday Night: A slight chance of showers, then a chance of showers and thunderstorms after 10pm. Mostly cloudy, with a low around 62. South southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    Low: 62 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 79. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 70%.

    High: 79 °F

    Breezy.
    Chance
    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 40. Chance of precipitation is 70%.

    Low: 40 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A 30 percent chance of showers. Mostly cloudy, with a high near 47.

    High: 47 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers. Mostly cloudy, with a low around 34.

    Low: 34 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers likely. Mostly cloudy, with a high near 49.

    High: 49 °F

    Showers
    Likely

Detailed Forecast

Today
Partly sunny, with a high near 65. South southwest wind around 15 mph, with gusts as high as 25 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 51. South wind around 10 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 79. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
A slight chance of showers, then a chance of showers and thunderstorms after 10pm. Mostly cloudy, with a low around 62. South southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Tuesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 79. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 70%.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 40. Chance of precipitation is 70%.
Wednesday
A 30 percent chance of showers. Mostly cloudy, with a high near 47.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 34.
Thursday
Showers likely. Mostly cloudy, with a high near 49.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 38.
Friday
Mostly cloudy, with a high near 64.
Friday Night
A chance of showers. Mostly cloudy, with a low around 49.
Saturday
Showers likely. Mostly cloudy, with a high near 65. Breezy.
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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:
8:21 am CDT Mar 29, 2026
Forecast Valid:
9am CDT Mar 29, 2026-6pm CDT Apr 4, 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