TODAY DEC22
TEMPERATURE38
HUMIDITY99
PRESSURE
WIND COND.58 4.8
  • 5534Mon20%
  • 5023Tue80%40%
  • 4427
  • 4628Thu
  • 4531Fri
daynightWeather update from SIARD at
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Weather Quick Facts

  • The highest monthly average temperature in Grass Valley for July is 77.1 degrees
  • The lowest monthly average temperature in Grass Valley for December is 28.4 degrees
  • The most monthly precipitation in Grass Valley occurs in December with 1.4 inches
  • The air quality index in Grass Valley is 67% better than the national average
  • The pollution index in Grass Valley is 97% better than the national average

Compare Grass Valley, NV Weather

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      Grass 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
      January17°F43°F29°F1.1"
      February22°F50°F36°F0.8"
      March25°F59°F42°F1.0"
      April29°F65°F47°F1.2"
      May37°F74°F56°F1.0"
      June45°F86°F67°F0.5"
      July53°F97°F77°F0.2"
      August49°F93°F73°F0.3"
      September40°F85°F62°F0.4"
      October29°F70°F49°F1.1"
      November23°F56°F38°F0.8"
      December15°F43°F28°F1.4"

      Grass 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.
      IndexGrass ValleyNevadaNational
      Air quality index143842
      Pollution index85,7552,601,9142,726,193

      Grass Valley air quality

      MeasurementTotal
      Days measured365
      Days with good air quality363
      Days with moderate air quality2
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.000%
      Benzene0.001%
      Carbon Tetrachloride0.000%
      Lead0.002%
      Mercury0.000%

      Average monthly Grass Valley temperature with heat index

      Grass Valley monthly precipitation with daily maximum

      Grass Valley monthly snow depth with daily maximum

      Grass Valley monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Winnemucca, NV7,7521472.0%
      Golconda, NV761472.0%
      Grass Valley, NV9671472.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Hollins, AL9673824.0%
      Bolton-Est, QC967n/a 
      Kerrobert, SK967n/a 
      Minkler, CA9686020.0%
      White Springs, FL9663824.0%
      Grass Valley, NV9671472.0%
      Source: The Grass Valley, NV 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.