TODAY NOV02
TEMPERATURE43
HUMIDITY100
PRESSURE101150
WIND COND.150 11.2
  • 543670%
  • 6240Sun
  • 6541Mon
  • 6541Tue
  • 6541Wed
daynightWeather update from Nevada County Air Park at
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Weather Quick Facts

  • The highest monthly average temperature in Alta Sierra for July is 79 degrees
  • The lowest monthly average temperature in Alta Sierra for December is 45.7 degrees
  • The most monthly precipitation in Alta Sierra occurs in January with 10.1 inches
  • The air quality index in Alta Sierra is 5% worse than the national average
  • The pollution index in Alta Sierra is 57% worse than the national average

Compare Alta Sierra, CA Weather

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      Alta Sierra 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
      January38°F57°F47°F10.1"
      February41°F62°F51°F8.0"
      March44°F67°F55°F8.4"
      April46°F74°F59°F4.6"
      May53°F83°F68°F2.6"
      June58°F91°F75°F2.6"
      July62°F96°F79°F0.2"
      August60°F95°F77°F0.4"
      September57°F90°F73°F1.3"
      October50°F79°F63°F4.8"
      November43°F65°F53°F7.5"
      December37°F56°F46°F9.8"

      Alta Sierra 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.
      IndexAlta SierraCaliforniaNational
      Air quality index445542
      Pollution index4,289,31010,473,1902,726,193

      Alta Sierra air quality

      MeasurementTotal
      Days measured365
      Days with good air quality239
      Days with moderate air quality124
      Days w/ poor A.Q. for sensitive groups2
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.050%
      Benzene0.070%
      Carbon Tetrachloride0.001%
      Lead0.060%
      Mercury0.010%

      Average monthly Alta Sierra temperature with heat index

      Alta Sierra monthly precipitation with daily maximum

      Alta Sierra monthly snow depth with daily maximum

      Alta Sierra monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Lake Wildwood, CA4,7094412.0%
      Smartsville, CA4874412.0%
      Alta, CA7034412.0%
      Nevada City, CA3,1454412.0%
      Colfax, CA2,2584412.0%
      Alta Sierra, CA7,6204412.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Kent, BC7,619n/a 
      Rhinelander, WI7,6173432.0%
      Decorah, IA7,6153530.0%
      Pulaski, TN7,6142746.0%
      Comox Valley B (Lazo North), BC7,614n/a 
      Alta Sierra, CA7,6204412.0%
      Source: The Alta Sierra, 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.