TODAY MAY15
TEMPERATURE54
HUMIDITY80
PRESSURE29.97
WIND COND.298
  • 7350Sat20%
  • 6451Sun40%30%
  • 7251Mon
  • 7752Tue
  • 7751Wed
daynightWeather update from EW1292 Hemet at

Key findings

  • The highest monthly average temperature in Winchester for August is 77.2 degrees
  • The lowest monthly average temperature in Winchester for December is 50.2 degrees
  • The most monthly precipitation in Winchester occurs in December with 2.9 inches
  • The air quality index in Winchester is 79% worse than the national average
  • The pollution index in Winchester is 350% worse than the national average

Compare Winchester, CA Weather

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      Winchester 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
      January37°F67°F51°F2.5"
      February38°F68°F52°F1.6"
      March40°F73°F56°F1.1"
      April44°F77°F59°F0.8"
      May50°F81°F64°F0.3"
      June55°F90°F72°F0.0"
      July62°F95°F77°F0.3"
      August61°F95°F77°F0.7"
      September58°F93°F74°F0.2"
      October50°F83°F65°F0.3"
      November41°F75°F57°F0.7"
      December36°F66°F50°F2.9"

      Winchester 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.
      IndexWinchesterCaliforniaNational
      Air quality index895550
      Pollution index22,790,90018,106,7265,066,862

      Winchester air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality42
      Days with moderate air quality178
      Days w/ poor A.Q. for sensitive groups79
      Days with unhealthy air quality58

      Winchester air quality information

      PollutantTotal
      Arsenic0.060%
      Benzene0.190%
      Carbon Tetrachloride0.010%
      Lead0.220%
      Mercury0.230%

      Average monthly Winchester temperature with heat index

      Winchester monthly precipitation with daily maximum

      Winchester monthly snow depth with daily maximum

      Winchester monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Moreno Valley, CA202,0618978%
      Green Acres, CA2,5608978%
      Meadowbrook, CA2,7828978%
      Valle Vista, CA16,2448978%
      March ARB, CA1,1458978%
      Winchester, CA2,4078978%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Dripping Springs, TX2,4074412%
      Fort Polk North, LA2,4063040%
      Buna, TX2,4084510%
      Lake Katrine, NY2,4083628%
      Hale Center, TX2,4062550%
      Winchester, CA2,4078978%
      Source: The Winchester, 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.