TODAY NOV22
TEMPERATURE31
HUMIDITY85
PRESSURE100510
WIND COND.290 9.4
  • 4440Fri100%80%
  • 4838Sat90%30%
  • 4838Sun20%
  • 5538Mon40%80%
  • 4632Tue60%
daynightWeather update from Pittsburgh - Allegheny County Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Saint Clair for July is 73.5 degrees
  • The lowest monthly average temperature in Saint Clair for January is 29.7 degrees
  • The most monthly precipitation in Saint Clair occurs in July with 5.1 inches
  • The air quality index in Saint Clair is 33% worse than the national average
  • The pollution index in Saint Clair is 67% better than the national average

Compare Pittsburgh, PA Weather

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      Saint Clair 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
      January22°F38°F30°F3.2"
      February23°F39°F30°F2.2"
      March32°F52°F41°F3.4"
      April43°F65°F53°F3.4"
      May52°F74°F62°F4.2"
      June60°F81°F70°F5.1"
      July64°F84°F73°F5.1"
      August63°F82°F72°F4.1"
      September56°F77°F66°F3.1"
      October46°F65°F54°F3.8"
      November35°F54°F44°F2.8"
      December28°F43°F35°F3.7"

      Saint Clair 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.
      IndexSaint ClairPittsburghPennsylvania
      Air quality index565645
      Pollution index889,808960,2134,584,805

      Saint Clair air quality

      MeasurementTotal
      Days measured365
      Days with good air quality129
      Days with moderate air quality220
      Days w/ poor A.Q. for sensitive groups12
      Days with unhealthy air quality4

      Air quality details

      PollutantTotal
      Arsenic0.001%
      Benzene0.020%
      Carbon Tetrachloride0.002%
      Lead0.001%
      Mercury0.000%

      Average monthly Saint Clair temperature with heat index

      Saint Clair monthly precipitation with daily maximum

      Saint Clair monthly snow depth with daily maximum

      Saint Clair monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Aliquippa, PA8,918688.0%
      McKees Rocks, PA5,8925612.0%
      Wilkinsburg, PA15,3675612.0%
      Ben Avon, PA1,9315612.0%
      Cheswick, PA1,6565612.0%
      Pittsburgh, PA301,2865612.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Cincinnati, OH302,687548.0%
      St. Louis, MO304,709548.0%
      St. Paul, MN305,877468.0%
      Greensboro, NC294,3954314.0%
      Gatineau, QC293,695n/a 
      Pittsburgh, PA301,2865612.0%
      Source: The Saint Clair, Pittsburgh, PA 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.