TODAY AUG20
TEMPERATURE69
HUMIDITY65
PRESSURE29.86
WIND COND.190 11.4
  • 8452Mon
  • 8052Tue
  • 8152Wed
  • 8251Thu
  • 8350Fri
daynightWeather update from Napa, Napa County Airport at

Yountville Average Weather

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"

Did you know?

  • The highest monthly average temperature in Yountville for July is 65 degrees.
  • The lowest monthly average temperature in Yountville for December is 47 degrees.
  • The most monthly precipitation in Yountville occurs in January with 3.8 inches.
  • The air quality index in Yountville is 13% better than the national average.
  • The pollution index in Yountville is 55% worse than the national average.

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Compare Yountville, CA Weather To Other Cities

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 index435550
Pollution index7,898,29018,106,7265,066,862

Yountville air quality information

MeasurementTotal
Days measured365
Days with good air quality220
Days with moderate air quality143
Days w/ poor A.Q. for sensitive groups2
Days with unhealthy air quality

Yountville air quality information

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

City, StatePopulationAir Quality IndexNational Avg.
Calistoga, CA5,2813530%
Kenwood, CA1,2273530%
Deer Park, CA1,0923530%
Glen Ellen, CA7263530%
Petaluma, CA59,7573530%
Yountville, CA2,9914314%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Milford, IA2,9914020%
Churchill, PA2,9905612%
Arcadia, WI2,9902158%
Cut Bank, MT2,9932648%
Fort Branch, IN2,989484%
Yountville, CA2,9914314%
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.