TODAY MAY29
TEMPERATURE65
HUMIDITY66
PRESSURE
WIND COND.264 16
  • 7456Sat60%
  • 7857Sun
  • 7856Mon
  • 8459Tue
  • 8357Wed
daynightWeather update from BLACK DIAMOND at
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Bethel Island 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
January39°F60°F48°F2.5"
February42°F65°F53°F2.6"
March46°F69°F56°F2.7"
April48°F74°F60°F1.5"
May52°F79°F63°F0.1"
June56°F87°F69°F0.4"
July58°F90°F71°F0.0"
August58°F88°F70°F0.0"
September57°F88°F70°F0.1"
October52°F80°F64°F0.7"
November44°F67°F54°F1.6"
December39°F60°F49°F3.1"

Did you know?

  • The highest monthly average temperature in Bethel Island for July is 71 degrees.
  • The lowest monthly average temperature in Bethel Island for January is 48 degrees.
  • The most monthly precipitation in Bethel Island occurs in December with 3.1 inches.
  • The air quality index in Bethel Island is 15% worse than the national average.
  • The pollution index in Bethel Island is 170% worse than the national average.

Compare Bethel Island, CA Weather To Other Cities

      vs

      Bethel Island 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.
      IndexBethel IslandCaliforniaNational
      Air quality index575550
      Pollution index13,698,50018,106,7265,066,862

      Bethel Island air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality128
      Days with moderate air quality207
      Days w/ poor A.Q. for sensitive groups21
      Days with unhealthy air quality9

      Bethel Island air quality information

      PollutantTotal
      Arsenic0.040%
      Benzene0.110%
      Carbon Tetrachloride0.330%
      Lead0.070%
      Mercury0.120%

      Average monthly Bethel Island temperature with heat index

      Bethel Island monthly precipitation with daily maximum

      Bethel Island monthly snow depth with daily maximum

      Bethel Island monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Pittsburg, CA67,9984314%
      Antioch, CA108,6755714%
      Isleton, CA7875714%
      Rio Vista, CA8,0555714%
      Brentwood, CA56,9235714%
      Bethel Island, CA2,1995714%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Idalou, TX2,2002648%
      St. Hedwig, TX2,2004510%
      Abram, TX2,2003628%
      Wellington, TX2,2004020%
      Lyman, WY2,1974020%
      Bethel Island, CA2,1995714%
      Source: The Bethel Island, 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.