TODAY MAY12
TEMPERATURE69
HUMIDITY63
PRESSURE30.01
WIND COND.2
  • 8158Thu
  • 7756Fri
  • 7355Sat
  • 7255Sun
  • 7657Mon
daynightWeather update from Los Angeles / USC Campus Downtown at

Key findings

  • The highest monthly average temperature in South Pasadena for August is 72.5 degrees
  • The lowest monthly average temperature in South Pasadena for December is 57 degrees
  • The most monthly precipitation in South Pasadena occurs in January with 3.5 inches
  • The air quality index in South Pasadena is 45% worse than the national average
  • The pollution index in South Pasadena is 2653% worse than the national average

Compare South Pasadena, CA Weather

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      South Pasadena 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
      January48°F70°F58°F3.5"
      February50°F70°F59°F2.9"
      March52°F72°F61°F1.5"
      April55°F74°F63°F0.7"
      May58°F75°F65°F0.5"
      June61°F78°F68°F0.0"
      July65°F83°F72°F0.0"
      August65°F84°F73°F0.0"
      September64°F85°F72°F0.3"
      October60°F81°F69°F0.7"
      November54°F75°F63°F0.8"
      December48°F69°F57°F2.8"

      South Pasadena 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.
      IndexSouth PasadenaCaliforniaNational
      Air quality index725550
      Pollution index139,490,00018,106,7265,066,862

      South Pasadena air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality66
      Days with moderate air quality208
      Days w/ poor A.Q. for sensitive groups62
      Days with unhealthy air quality28

      South Pasadena air quality information

      PollutantTotal
      Arsenic0.200%
      Benzene0.950%
      Carbon Tetrachloride0.080%
      Lead1.320%
      Mercury0.440%

      Average monthly South Pasadena temperature with heat index

      South Pasadena monthly precipitation with daily maximum

      South Pasadena monthly snow depth with daily maximum

      South Pasadena monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Glendale, CA197,8957244%
      Westmont, CA32,1477244%
      Commerce, CA12,9977244%
      La Mirada, CA49,1307244%
      Pico Rivera, CA63,7247244%
      South Pasadena, CA25,9367244%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Carrollton, GA25,960524%
      Vernon Hills, IL25,9105510%
      Graham, WA25,8973040%
      Mount Pleasant, MI25,8962648%
      Asheboro, NC25,9784020%
      South Pasadena, CA25,9367244%
      Source: The South Pasadena, 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.