TODAY MAR07
TEMPERATURE
HUMIDITY
PRESSURE30.13
WIND COND.
  • 6540Sun
  • 5842Mon20%20%
  • 5643Tue70%60%
  • 5841Wed
  • 6341Thu
daynightWeather update from Vacaville Nut Tree Airport at

Key findings

  • The highest monthly average temperature in Hartley for July is 77 degrees
  • The lowest monthly average temperature in Hartley for December is 47 degrees
  • The most monthly precipitation in Hartley occurs in January with 5.6 inches
  • The air quality index in Hartley is 30% better than the national average
  • The pollution index in Hartley is 52% better than the national average

Compare Hartley, CA Weather

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      Hartley 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°F60°F47°F5.6"
      February41°F64°F52°F4.8"
      March45°F69°F56°F4.6"
      April47°F74°F60°F2.5"
      May52°F82°F67°F0.7"
      June57°F91°F74°F0.3"
      July60°F96°F77°F0.0"
      August59°F95°F75°F0.0"
      September56°F92°F73°F0.1"
      October50°F81°F64°F1.9"
      November43°F68°F54°F2.3"
      December37°F59°F47°F4.6"

      Hartley 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.
      IndexHartleyCaliforniaNational
      Air quality index355550
      Pollution index2,457,15018,106,7265,066,862

      Hartley air quality information

      MeasurementTotal
      Days measured363
      Days with good air quality330
      Days with moderate air quality31
      Days w/ poor A.Q. for sensitive groups2
      Days with unhealthy air quality0

      Hartley air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.080%
      Carbon Tetrachloride0.002%
      Lead0.010%
      Mercury0.020%

      Average monthly Hartley temperature with heat index

      Hartley monthly precipitation with daily maximum

      Hartley monthly snow depth with daily maximum

      Hartley monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Fairfield, CA110,9533530%
      Moskowite Corner, CA1983530%
      Elmira, CA2083530%
      Green Valley CDP (Los Angeles County), CA1,0003530%
      Suisun City, CA29,0453530%
      Hartley, CA2,9883530%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Fort Branch, IN2,9894510%
      Cayucos, CA2,987468%
      Park Hills, KY2,987548%
      Leesburg, GA2,9894020%
      Arcadia, WI2,9901570%
      Hartley, CA2,9883530%
      Source: The Hartley, 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.