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Hazardous Weather Conditions

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Mostly Cloudy

81°F

27°C

Humidity 84%
Wind Speed S 6 mph
Barometer 30.05 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 15 Aug 12:21 pm CDT
Extended Forecast for

Ottawa IL

  • This Afternoon

    This Afternoon: A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 83. Southwest wind 5 to 10 mph.

    High: 83 °F

    Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers before midnight, then a chance of showers and thunderstorms between midnight and 4am, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 73. South southwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 73 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms, mainly before 8am. Mostly cloudy, with a high near 84. West northwest wind around 10 mph, with gusts as high as 15 mph.

    High: 84 °F

    Chance
    T-storms then
    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 66. North northwest wind 5 to 10 mph.

    Low: 66 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 82. North wind around 5 mph.

    High: 82 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 69.

    Low: 69 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers before 1pm. Mostly cloudy, with a high near 81.

    High: 81 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 83. Southwest wind 5 to 10 mph.
Tonight
A slight chance of showers before midnight, then a chance of showers and thunderstorms between midnight and 4am, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 73. South southwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A 40 percent chance of showers and thunderstorms, mainly before 8am. Mostly cloudy, with a high near 84. West northwest wind around 10 mph, with gusts as high as 15 mph.
Sunday Night
Partly cloudy, with a low around 66. North northwest wind 5 to 10 mph.
Monday
Sunny, with a high near 82. North wind around 5 mph.
Monday Night
Mostly clear, with a low around 64.
Tuesday
Mostly sunny, with a high near 83.
Tuesday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 69.
Wednesday
A chance of showers before 1pm. Mostly cloudy, with a high near 81.
Wednesday Night
Partly cloudy, with a low around 61.
Thursday
Mostly sunny, with a high near 76.
Thursday Night
Partly cloudy, with a low around 59.
Friday
Mostly sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ottawa IL
 41.35°N 88.85°W
Last Update:
8:46 am CDT Aug 15, 2026
Forecast Valid:
12pm CDT Aug 15, 2026-6pm CDT Aug 21, 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