TODAY NOV22
TEMPERATURE61
HUMIDITY87
PRESSURE101630
WIND COND.170 20.5
  • 5946Fri100%100%
  • 5841Sat60%40%
  • 5445Sun60%80%
  • 5645Mon
  • 5641Tue
daynightWeather update from Napa, Napa County Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Yountville for July is 64.6 degrees
  • The lowest monthly average temperature in Yountville for December is 46.6 degrees
  • The most monthly precipitation in Yountville occurs in January with 3.8 inches
  • The air quality index in Yountville is 17% better than the national average
  • The pollution index in Yountville is 190% worse than the national average

Compare Yountville, CA Weather

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      Yountville Average Temperature

      In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
      MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
      January36°F58°F47°F3.8"
      February39°F62°F50°F3.4"
      March41°F66°F52°F3.0"
      April42°F69°F55°F1.6"
      May46°F74°F59°F0.5"
      June50°F80°F64°F0.3"
      July53°F81°F65°F0.0"
      August53°F80°F64°F0.0"
      September49°F82°F64°F0.1"
      October45°F76°F59°F1.3"
      November40°F66°F52°F1.8"
      December36°F58°F47°F3.8"

      Yountville air quality index & pollution index

      In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
      IndexYountvilleCaliforniaNational
      Air quality index355542
      Pollution index7,898,29010,473,1902,726,193

      Yountville air quality

      MeasurementTotal
      Days measured363
      Days with good air quality330
      Days with moderate air quality31
      Days w/ poor A.Q. for sensitive groups2
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.260%
      Benzene0.080%
      Carbon Tetrachloride0.005%
      Lead0.240%
      Mercury0.270%

      Average monthly Yountville temperature with heat index

      Yountville monthly precipitation with daily maximum

      Yountville monthly snow depth with daily maximum

      Yountville monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Calistoga, CA5,3463432.0%
      Petaluma, CA60,8653432.0%
      Deer Park, CA7723432.0%
      Glen Ellen, CA1,2143432.0%
      Angwin, CA3,4153432.0%
      Yountville, CA3,0013530.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Epping, NH3,0013726.0%
      Tonkawa, OK3,0004020.0%
      Fairview CDP (Westchester County), NY2,9993628.0%
      Mendenhall, MS3,0034412.0%
      Shark River Hills, NJ3,003512.0%
      Yountville, CA3,0013530.0%
      Source: The Yountville, CA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.