TODAY MAR28
TEMPERATURE49
HUMIDITY86
PRESSURE101760
WIND COND.270 9.4
  • 5845Thu
  • 5447Fri70%90%
  • 5844Sat60%20%
  • 6245Sun
  • 7048Mon
daynightWeather update from Napa, Napa County Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Green Valley for July is 64.6 degrees
  • The lowest monthly average temperature in Green Valley for December is 46.6 degrees
  • The most monthly precipitation in Green Valley occurs in January with 3.8 inches
  • The air quality index in Green Valley is 17% better than the national average
  • The pollution index in Green Valley is 161% worse than the national average

Compare Green Valley, CA Weather

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      Green Valley 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"

      Green Valley 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.
      IndexGreen ValleyCaliforniaNational
      Air quality index355542
      Pollution index7,123,51010,473,1902,726,193

      Green Valley air quality information

      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

      Green Valley air quality information

      PollutantTotal
      Arsenic0.110%
      Benzene0.070%
      Carbon Tetrachloride0.000%
      Lead0.090%
      Mercury0.050%

      Average monthly Green Valley temperature with heat index

      Green Valley monthly precipitation with daily maximum

      Green Valley monthly snow depth with daily maximum

      Green Valley monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Rutherford, CA1003530.0%
      Hartley, CA2,6553530.0%
      Silverado Resort, CA1,1713530.0%
      Yountville, CA3,0013530.0%
      Lemon Hill, CA15,1043530.0%
      Green Valley, CA1,5833530.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Resaca, GA1,5834314.0%
      Hartley, IA1,5833530.0%
      Elmendorf, TX1,583492.0%
      Metlakatla, AK1,5822060.0%
      Grayson, CA1,582492.0%
      Green Valley, CA1,5833530.0%
      Source: The Green Valley, 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.