TODAY MAR19
TEMPERATURE46
HUMIDITY100
PRESSURE101860
WIND COND.
  • 7049Tue
  • 7047Wed
  • 6747Thu
  • 6647Fri
  • 5743Sat
daynightWeather update from COLUMBIA at
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Weather Quick Facts

  • The highest monthly average temperature in Jamestown for July is 80.2 degrees
  • The lowest monthly average temperature in Jamestown for January is 46.9 degrees
  • The most monthly precipitation in Jamestown occurs in January with 2.4 inches
  • The air quality index in Jamestown is 7% better than the national average
  • The pollution index in Jamestown is 4% better than the national average

Compare Jamestown, CA Weather

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      Jamestown 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
      January38°F58°F47°F2.4"
      February42°F64°F52°F1.9"
      March46°F70°F57°F1.7"
      April49°F76°F61°F1.3"
      May54°F85°F69°F0.4"
      June60°F93°F76°F0.2"
      July64°F98°F80°F0.0"
      August63°F96°F78°F0.0"
      September59°F91°F74°F0.1"
      October52°F80°F64°F0.7"
      November44°F68°F54°F1.1"
      December38°F58°F47°F2.3"

      Jamestown 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.
      IndexJamestownCaliforniaNational
      Air quality index395542
      Pollution index2,624,52010,473,1902,726,193

      Jamestown air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality331
      Days with moderate air quality33
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality

      Jamestown air quality information

      PollutantTotal
      Arsenic0.020%
      Benzene0.040%
      Carbon Tetrachloride0.000%
      Lead0.070%
      Mercury0.010%

      Average monthly Jamestown temperature with heat index

      Jamestown monthly precipitation with daily maximum

      Jamestown monthly snow depth with daily maximum

      Jamestown monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Pine Mountain Lake, CA2,8013922.0%
      Chinese Camp, CA1463922.0%
      Forest Meadows, CA1,3243922.0%
      Phoenix Lake, CA4,8203922.0%
      Tuolumne City, CA1,4143922.0%
      Jamestown, CA3,3793922.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Waldron, AR3,3793628.0%
      Sleepy Eye, MN3,3783236.0%
      Compton, QC3,378n/a 
      Lincoln, ID3,3802746.0%
      Greentown, OH3,380468.0%
      Jamestown, CA3,3793922.0%
      Source: The Jamestown, 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.