TODAY MAY30
TEMPERATURE62
HUMIDITY79
PRESSURE
WIND COND.231 4
  • 7958Sat
  • 8360Sun
  • 8461Mon
  • 8762Tue
  • 8662Wed
daynightWeather update from SANTA FE DAM at
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Charter Oak 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
January44°F69°F56°F2.3"
February45°F70°F57°F2.0"
March48°F74°F60°F1.2"
April51°F77°F62°F0.7"
May55°F81°F66°F0.4"
June60°F88°F72°F0.0"
July65°F94°F77°F0.1"
August65°F95°F78°F0.0"
September64°F93°F76°F0.2"
October57°F84°F69°F0.4"
November49°F77°F62°F0.6"
December43°F68°F55°F2.6"

Did you know?

  • The highest monthly average temperature in Charter Oak for August is 78 degrees.
  • The lowest monthly average temperature in Charter Oak for December is 55 degrees.
  • The most monthly precipitation in Charter Oak occurs in December with 2.6 inches.
  • The air quality index in Charter Oak is 71% worse than the national average.
  • The pollution index in Charter Oak is 2653% worse than the national average.

Compare Charter Oak, CA Weather To Other Cities

      vs

      Charter Oak 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.
      IndexCharter OakCaliforniaNational
      Air quality index855550
      Pollution index139,490,00018,106,7265,066,862

      Charter Oak air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality24
      Days with moderate air quality211
      Days w/ poor A.Q. for sensitive groups102
      Days with unhealthy air quality25

      Charter Oak air quality information

      PollutantTotal
      Arsenic0.200%
      Benzene0.950%
      Carbon Tetrachloride0.080%
      Lead1.320%
      Mercury0.440%

      Average monthly Charter Oak temperature with heat index

      Charter Oak monthly precipitation with daily maximum

      Charter Oak monthly snow depth with daily maximum

      Charter Oak monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Rosemead, CA54,5077448%
      San Gabriel, CA40,2007448%
      Sierra Madre, CA11,0677448%
      South San Jose Hills, CA19,9147448%
      Valinda, CA24,8707448%
      Charter Oak, CA9,4018570%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Dunn Loring, VA9,397492%
      Pleasant Hill, IA9,4064118%
      Jeannette, PA9,3955612%
      Linganore, MD9,3954118%
      Warren, PA9,4071962%
      Charter Oak, CA9,4018570%
      Source: The Charter Oak, 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.