TODAY OCT12
TEMPERATURE63
HUMIDITY50
PRESSURE101660
WIND COND.140 13
  • 6856Sat80%40%
  • 7854Sun
  • 8053
  • 7956Tue
  • 7450Wed
daynightWeather update from Santa Rosa, Santa Rosa Sonoma County Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Guerneville for July is 64.9 degrees
  • The lowest monthly average temperature in Guerneville for December is 46.1 degrees
  • The most monthly precipitation in Guerneville occurs in December with 6.9 inches
  • The air quality index in Guerneville is 19% better than the national average
  • The pollution index in Guerneville is 87% better than the national average

Compare Guerneville, CA Weather

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      Guerneville 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°F60°F46°F6.0"
      February39°F64°F50°F5.7"
      March41°F67°F52°F4.6"
      April43°F71°F55°F2.4"
      May46°F77°F60°F1.1"
      June50°F83°F64°F0.4"
      July52°F85°F65°F0.0"
      August52°F84°F64°F0.0"
      September49°F85°F64°F0.2"
      October46°F78°F59°F2.0"
      November41°F67°F52°F3.2"
      December36°F59°F46°F6.9"

      Guerneville 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.
      IndexGuernevilleCaliforniaNational
      Air quality index345542
      Pollution index360,23810,473,1902,726,193

      Guerneville air quality

      MeasurementTotal
      Days measured365
      Days with good air quality346
      Days with moderate air quality18
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality1

      Air quality details

      PollutantTotal
      Arsenic0.002%
      Benzene0.004%
      Carbon Tetrachloride0.000%
      Lead0.002%
      Mercury0.000%

      Average monthly Guerneville temperature with heat index

      Guerneville monthly precipitation with daily maximum

      Guerneville monthly snow depth with daily maximum

      Guerneville monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Larkfield-Wikiup, CA8,0803432.0%
      Bodega Bay, CA1,0693432.0%
      Geyserville, CA6713432.0%
      Monte Rio, CA1,0233432.0%
      Sereno del Mar, CA573432.0%
      Guerneville, CA4,7473432.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Telford, PA4,7474216.0%
      Highlands, NJ4,746512.0%
      Columbia, KY4,7484020.0%
      West Elmira, NY4,7453530.0%
      Dallas, NC4,7443628.0%
      Guerneville, CA4,7473432.0%
      Source: The Guerneville, 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.