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.

Fog/Mist

39°F

4°C

Humidity 100%
Wind Speed N 5 mph
Barometer 29.96 in
Dewpoint 39°F (4°C)
Visibility 0.75 mi
Wind Chill35°F (2°C)
Last update 5 Mar 5:06 am CST
Extended Forecast for

Mendota IL

Dense Fog Advisory March 5, 05:39am until March 5, 12:00pm
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory March 5, 05:39am until March 5, 12:00pm

    NOW until 12:00pm Thu

    Dense Fog Advisory

  • Overnight

    Low: 40 °F

    Areas Drizzle
    and Areas
    Dense Fog

  • Thursday

    Thursday: Patchy showers and thunderstorms before 11am, then areas of drizzle between 11am and noon. Areas of dense fog before 3pm. Otherwise, cloudy, with a high near 52. Northeast wind around 5 mph becoming northwest in the afternoon. Chance of precipitation is 40%.

    High: 52 °F

    Areas Showers
    and Areas
    Dense Fog
    then Patchy
    Fog

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after 5am. Areas of fog. Otherwise, cloudy, with a low around 43. East southeast wind 5 to 10 mph.

    Low: 43 °F

    Areas Fog
    then Slight
    Chance
    Showers and
    Areas Fog

  • Friday

    Friday: Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms, mainly between noon and 3pm. Areas of fog before noon. High near 72. Breezy, with a southeast wind 10 to 20 mph becoming south southwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 80%.

    High: 72 °F

    Showers and
    Areas Fog
    then Chance
    Showers and
    Breezy

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 52. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.

    Low: 52 °F

    Breezy.
    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers before 9am. Partly sunny, with a high near 57. Breezy.

    High: 57 °F

    Breezy.
    Slight Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 61. Breezy.

    High: 61 °F

    Sunny then
    Sunny and
    Breezy

Detailed Forecast

Overnight
Areas of drizzle. Areas of dense fog. Otherwise, cloudy, with a low around 40. Northeast wind around 5 mph.
Thursday
Patchy showers and thunderstorms before 11am, then areas of drizzle between 11am and noon. Areas of dense fog before 3pm. Otherwise, cloudy, with a high near 52. Northeast wind around 5 mph becoming northwest in the afternoon. Chance of precipitation is 40%.
Thursday Night
A 20 percent chance of showers after 5am. Areas of fog. Otherwise, cloudy, with a low around 43. East southeast wind 5 to 10 mph.
Friday
Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms, mainly between noon and 3pm. Areas of fog before noon. High near 72. Breezy, with a southeast wind 10 to 20 mph becoming south southwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 80%.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 52. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.
Saturday
A 20 percent chance of showers before 9am. Partly sunny, with a high near 57. Breezy.
Saturday Night
Mostly clear, with a low around 34.
Sunday
Sunny, with a high near 61. Breezy.
Sunday Night
Clear, with a low around 44.
Monday
Sunny, with a high near 71.
Monday Night
Partly cloudy, with a low around 50.
Tuesday
Showers. Partly sunny, with a high near 68.
Tuesday Night
Showers. Mostly cloudy, with a low around 41.
Wednesday
Rain likely. Mostly cloudy, with a high near 51. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mendota IL
 41.56°N 89.1°W
Last Update:
5:21 am CST Mar 5, 2026
Forecast Valid:
5am CST Mar 5, 2026-6pm CDT Mar 11, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation