TODAY MAR07
TEMPERATURE35
HUMIDITY85
PRESSURE30.04
WIND COND.200 7.6
  • 4926Sun
  • 4526Mon30%30%
  • 4625Tue50%40%
  • 4723Wed
  • 4926Thu
daynightWeather update from Montague Siskiyou County Airport at

Key findings

  • The highest monthly average temperature in Yreka for July is 75 degrees
  • The lowest monthly average temperature in Yreka for December is 34 degrees
  • The most monthly precipitation in Yreka occurs in December with 2.2 inches
  • The air quality index in Yreka is 28% better than the national average
  • The pollution index in Yreka is 173% worse than the national average

Compare Yreka, CA Weather

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      Yreka 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
      January25°F46°F34°F1.7"
      February27°F53°F39°F1.5"
      March31°F58°F43°F1.5"
      April33°F64°F48°F1.0"
      May40°F74°F57°F0.9"
      June47°F83°F65°F0.8"
      July55°F94°F75°F0.2"
      August52°F93°F73°F0.2"
      September45°F85°F64°F0.2"
      October37°F70°F52°F1.3"
      November30°F54°F41°F1.5"
      December25°F45°F34°F2.2"

      Yreka 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.
      IndexYrekaCaliforniaNational
      Air quality index365550
      Pollution index13,842,60018,106,7265,066,862

      Yreka air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality295
      Days with moderate air quality63
      Days w/ poor A.Q. for sensitive groups3
      Days with unhealthy air quality4

      Yreka air quality information

      PollutantTotal
      Arsenic0.020%
      Benzene0.210%
      Carbon Tetrachloride0.030%
      Lead0.030%
      Mercury0.020%

      Average monthly Yreka temperature with heat index

      Yreka monthly precipitation with daily maximum

      Yreka monthly snow depth with daily maximum

      Yreka monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Grenada, CA4323628%
      Fort Jones, CA8163628%
      Hornbrook, CA2103628%
      Gazelle, CA503628%
      Montague, CA1,3783628%
      Yreka, CA7,5983628%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Fairfax, CA7,5984020%
      Selah, WA7,5993824%
      Rockton, IL7,5964216%
      Sanger, TX7,595512%
      Holly Springs, MS7,5914510%
      Yreka, CA7,5983628%
      Source: The Yreka, 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.