TODAY JUN01
TEMPERATURE69
HUMIDITY55
PRESSURE
WIND COND.360 7.6
  • 8260Tue
  • 8158Wed
  • 7355Thu
  • 6856Fri
  • 6554Sat
daynightWeather update from Vallejo at
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Hercules 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°F58°F48°F3.3"
February43°F62°F52°F3.0"
March45°F67°F54°F1.8"
April47°F71°F57°F1.9"
May52°F78°F63°F0.6"
June56°F85°F68°F0.0"
July58°F90°F71°F0.0"
August57°F90°F70°F0.0"
September56°F86°F68°F0.0"
October50°F77°F62°F1.4"
November45°F68°F55°F1.2"
December40°F57°F47°F2.3"

Did you know?

  • The highest monthly average temperature in Hercules for July is 71 degrees.
  • The lowest monthly average temperature in Hercules for December is 47 degrees.
  • The most monthly precipitation in Hercules occurs in January with 3.3 inches.
  • The air quality index in Hercules is 14% better than the national average.
  • The pollution index in Hercules is 279% worse than the national average.

Compare Hercules, CA Weather To Other Cities

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      Hercules 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.
      IndexHerculesCaliforniaNational
      Air quality index435550
      Pollution index19,202,40018,106,7265,066,862

      Hercules air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality241
      Days with moderate air quality115
      Days w/ poor A.Q. for sensitive groups9
      Days with unhealthy air quality

      Hercules air quality information

      PollutantTotal
      Arsenic0.180%
      Benzene0.140%
      Carbon Tetrachloride0.010%
      Lead0.280%
      Mercury0.060%

      Average monthly Hercules temperature with heat index

      Hercules monthly precipitation with daily maximum

      Hercules monthly snow depth with daily maximum

      Hercules monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Albany, CA19,4204314%
      Belvedere, CA2,0174314%
      Castle Hill, CA1,2024314%
      Crockett, CA3,1034314%
      Emeryville, CA11,1114314%
      Hercules, CA25,0114314%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Starkville, MS25,0113530%
      Paducah, KY25,0103628%
      Junction City, KS25,0163236%
      Canton, GA25,022524%
      Mint Hill, NC25,0244216%
      Hercules, CA25,0114314%
      Source: The Hercules, 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.