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

Heavy Mountain Snow in the Northwest U.S.; Wintry Mix in the Northeast U.S.

Two more cold fronts will pass through the Northwest U.S. this week with heavy mountain snow continuing across the Cascades, and northern Rockies. A quick moving storm system will bring mixed precipitation including some freezing rain across the Northeast U.S. overnight into Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Fog/Mist

36°F

2°C

Humidity 100%
Wind Speed W 10 mph
Barometer 29.83 in
Dewpoint 36°F (2°C)
Visibility 3.00 mi
Wind Chill29°F (-2°C)
Last update 7 Jan 12:19 am CST
Extended Forecast for

Ottawa IL

  • Overnight

    Overnight: Patchy dense fog. Otherwise, cloudy, with a low around 34. West wind 5 to 10 mph.

    Low: 34 °F

    Patchy Dense
    Fog

  • Wednesday

    Wednesday: Areas of dense fog before noon. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 49. West wind 5 to 10 mph becoming south in the afternoon.

    High: 49 °F

    Areas Dense
    Fog then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 39. South wind around 10 mph.

    Low: 39 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Rain, mainly after noon. High near 53. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.

    High: 53 °F

    Chance Rain
    then Rain

  • Thursday Night

    Thursday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 43. South southeast wind around 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.

    Low: 43 °F

    Rain Likely
    then Chance
    Rain

  • Friday

    Friday: A 20 percent chance of rain. Mostly cloudy, with a high near 45.

    High: 45 °F

    Slight Chance
    Rain

  • Friday Night

    Friday Night: A 50 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Slight Chance
    Rain then
    Chance Rain

  • Saturday

    Saturday: A chance of rain before noon, then a chance of snow. Mostly cloudy, with a high near 39.

    High: 39 °F

    Chance Rain
    then Chance
    Snow

  • Saturday Night

    Saturday Night: A chance of snow. Mostly cloudy, with a low around 23.

    Low: 23 °F

    Chance Snow

Detailed Forecast

Overnight
Patchy dense fog. Otherwise, cloudy, with a low around 34. West wind 5 to 10 mph.
Wednesday
Areas of dense fog before noon. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 49. West wind 5 to 10 mph becoming south in the afternoon.
Wednesday Night
Increasing clouds, with a low around 39. South wind around 10 mph.
Thursday
Rain, mainly after noon. High near 53. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.
Thursday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 43. South southeast wind around 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.
Friday
A 20 percent chance of rain. Mostly cloudy, with a high near 45.
Friday Night
A 50 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 35.
Saturday
A chance of rain before noon, then a chance of snow. Mostly cloudy, with a high near 39.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 23.
Sunday
Mostly sunny, with a high near 31.
Sunday Night
Partly cloudy, with a low around 24.
Monday
Mostly sunny, with a high near 41.
Monday Night
Partly cloudy, with a low around 28.
Tuesday
Partly sunny, with a high near 40.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ottawa IL
 41.35°N 88.85°W
Last Update:
12:11 am CST Jan 7, 2026
Forecast Valid:
12am CST Jan 7, 2026-6pm CST Jan 13, 2026
 
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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