TODAY MAY18
TEMPERATURE77
HUMIDITY34
PRESSURE29.99
WIND COND.220 9.4
  • 7643Wed
  • 7146Thu
  • 7550Fri
  • 7752Sat
  • 8453Sun
daynightWeather update from Sacramento, Sacramento Mather Airport at

Key findings

  • The highest monthly average temperature in Folsom for July is 74.3 degrees
  • The lowest monthly average temperature in Folsom for January is 46.5 degrees
  • The most monthly precipitation in Folsom occurs in December with 3.8 inches
  • The air quality index in Folsom is 5% worse than the national average
  • The pollution index in Folsom is 15% better than the national average

Compare Folsom, CA Weather

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      Folsom 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°F3.3"
      February41°F63°F51°F3.1"
      March44°F68°F55°F2.9"
      April47°F74°F59°F1.8"
      May52°F82°F65°F0.5"
      June57°F90°F71°F0.3"
      July59°F95°F74°F0.0"
      August58°F93°F73°F0.0"
      September56°F90°F70°F0.1"
      October50°F79°F63°F1.2"
      November43°F66°F53°F1.6"
      December38°F57°F47°F3.8"

      Folsom 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.
      IndexFolsomCaliforniaNational
      Air quality index525550
      Pollution index4,289,31018,106,7265,066,862

      Folsom air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality171
      Days with moderate air quality173
      Days w/ poor A.Q. for sensitive groups21
      Days with unhealthy air quality0

      Folsom air quality information

      PollutantTotal
      Arsenic0.050%
      Benzene0.070%
      Carbon Tetrachloride0.001%
      Lead0.060%
      Mercury0.010%

      Average monthly Folsom temperature with heat index

      Folsom monthly precipitation with daily maximum

      Folsom monthly snow depth with daily maximum

      Folsom monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Arden-Arcade, CA96,898524%
      Foothill Farms, CA33,384524%
      McClellan Park, CA1,093524%
      Roseville, CA128,276524%
      Coloma, CA852524%
      Folsom, CA74,960524%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Lake Charles, LA75,0444510%
      Plymouth, MN75,105468%
      Bethlehem, PA75,1104216%
      Pharr, TX75,1724216%
      Wyoming, MI74,6923824%
      Folsom, CA74,960524%
      Source: The Folsom, 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.