TODAY MAR28
TEMPERATURE46
HUMIDITY73
PRESSURE101290
WIND COND.330 11.2
  • 5535Fri
  • 6145Sat30%
  • 6342Sun
  • 5143Mon60%70%
  • 5443Tue80%60%
daynightWeather update from Philadelphia - Wings Field Airport at
New Real Estate Listings in Norristown Area
Search Homes for Sale in Norristown, PA

Weather Quick Facts

  • The highest monthly average temperature in Norristown for July is 75.8 degrees
  • The lowest monthly average temperature in Norristown for January is 32.9 degrees
  • The most monthly precipitation in Norristown occurs in August with 11 inches
  • The air quality index in Norristown is 21% worse than the national average
  • The pollution index in Norristown is 358% worse than the national average

Compare Norristown, PA Weather

      vs
      How would you rate the weather in Norristown?
      Write a review to give others more information about this area.
      How would you rate the air quality in Norristown?
      Write a review to give others more information about this area.
      See all Norristown poll results

      Norristown 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
      January26°F41°F33°F3.2"
      February26°F42°F33°F2.5"
      March34°F53°F42°F6.9"
      April43°F65°F53°F3.6"
      May52°F74°F63°F6.0"
      June61°F81°F71°F6.5"
      July66°F86°F76°F7.9"
      August63°F83°F73°F11.0"
      September56°F77°F66°F6.8"
      October46°F66°F55°F9.4"
      November37°F55°F45°F2.9"
      December31°F46°F38°F7.7"

      Norristown 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.
      IndexNorristownPennsylvaniaNational
      Air quality index514542
      Pollution index12,485,1004,584,8052,726,193

      Norristown air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality180
      Days with moderate air quality169
      Days w/ poor A.Q. for sensitive groups16
      Days with unhealthy air quality0

      Norristown air quality information

      PollutantTotal
      Arsenic0.020%
      Benzene0.100%
      Carbon Tetrachloride0.100%
      Lead0.120%
      Mercury0.010%

      Average monthly Norristown temperature with heat index

      Norristown monthly precipitation with daily maximum

      Norristown monthly snow depth with daily maximum

      Norristown monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Doylestown, PA8,2824118.0%
      Souderton, PA7,0194216.0%
      Harleysville, PA8,9754216.0%
      Spring City, PA3,3074216.0%
      Pottsgrove, PA3,2454216.0%
      Norristown, PA34,392512.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      University CDP (Orange County), FL34,3794314.0%
      Montgomery Village, MD34,413476.0%
      Georgetown, KY34,3624216.0%
      University City, MO34,336548.0%
      Socorro, TX34,329536.0%
      Norristown, PA34,392512.0%
      Source: The Norristown, 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.