TODAY AUG16
TEMPERATURE88
HUMIDITY45
PRESSURE
WIND COND.238 8
  • 9167Thu
  • 9368Fri
  • 9568Sat
  • 9768Sun
  • 9868Mon
daynightWeather update from SANTA FE DAM at

Charter Oak 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
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 70% worse than the national average.
  • The pollution index in Charter Oak is 2652% worse than the national average.

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Compare Charter Oak, CA Weather To Other Cities

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.
Arcadia, CA57,7557448%
Bradbury, CA9547448%
Citrus, CA11,7807448%
Duarte, CA21,7927448%
El Monte, CA115,6657448%
Charter Oak, CA9,4018570%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Dunn Loring, VA9,397492%
Pleasant Hill, IA9,4064118%
Warren, PA9,4071962%
Jeannette, PA9,3955612%
Linganore, MD9,3954118%
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.