Critical Fire Weather in the West; Monitoring Tropical Storm Erin

Gusty winds and low relative humidity will bring critical fire weather conditions to parts of the Great Basin, interior Northwest, and Rockies Thursday. Red Flag Warnings have been issued. While there is still uncertainty in what impacts might occur to the U.S. east coast next week, the risk of dangerous surf and rip currents across the western Atlantic basin is increasing. Read More >

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Fair

64°F

18°C

Humidity 96%
Wind Speed Calm
Barometer 29.99 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 13 Aug 11:55 pm CDT
Extended Forecast for

Ottawa IL

  • Overnight

    Overnight: Patchy fog after 3am.  Otherwise, mostly clear, with a low around 62. Calm wind.

    Low: 62 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 8am.  Otherwise, sunny, with a high near 84. Calm wind becoming east around 5 mph in the afternoon.

    High: 84 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 63. East wind around 5 mph becoming calm.

    Low: 63 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 88. Calm wind becoming south around 5 mph in the morning. Winds could gust as high as 10 mph.

    High: 88 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 70. South wind around 5 mph.

    Low: 70 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 70.

    Low: 70 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog after 3am. Otherwise, mostly clear, with a low around 62. Calm wind.
Thursday
Patchy fog before 8am. Otherwise, sunny, with a high near 84. Calm wind becoming east around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 63. East wind around 5 mph becoming calm.
Friday
Sunny, with a high near 88. Calm wind becoming south around 5 mph in the morning. Winds could gust as high as 10 mph.
Friday Night
Mostly clear, with a low around 70. South wind around 5 mph.
Saturday
Sunny, with a high near 92.
Saturday Night
Partly cloudy, with a low around 73.
Sunday
Mostly sunny, with a high near 91.
Sunday Night
Partly cloudy, with a low around 70.
Monday
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 64.
Wednesday
Mostly sunny, with a high near 79.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Ottawa IL
 41.35°N 88.85°W
9:07 pm CDT Aug 13, 2025
12am CDT Aug 14, 2025-6pm CDT Aug 20, 2025
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database