TODAY NOV25
TEMPERATURE36
HUMIDITY89
PRESSURE101590
WIND COND.160 13
  • 4830Tue
  • 4537Wed40%
  • 443170%30%
  • 3823Fri50%30%
  • 3323Sat30%
daynightWeather update from Pittsburgh - Allegheny County Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Herrs Island for July is 73.5 degrees
  • The lowest monthly average temperature in Herrs Island for January is 29.7 degrees
  • The most monthly precipitation in Herrs Island occurs in July with 5.1 inches
  • The air quality index in Herrs Island is 33% worse than the national average
  • The pollution index in Herrs Island is 65% better than the national average

Compare Pittsburgh, PA Weather

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      Herrs Island 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"

      Herrs Island 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.
      IndexHerrs IslandPittsburghPennsylvania
      Air quality index565645
      Pollution index960,213960,2134,584,805

      Herrs Island 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 Herrs Island temperature with heat index

      Herrs Island monthly precipitation with daily maximum

      Herrs Island monthly snow depth with daily maximum

      Herrs Island monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Baden, PA3,911688.0%
      Conway, PA2,150688.0%
      Aliquippa, PA8,918688.0%
      Enlow, PA8855612.0%
      McKees Rocks, PA5,8925612.0%
      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 Herrs Island, 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.