TODAY DEC22
TEMPERATURE25
HUMIDITY40
PRESSURE103250
WIND COND.360 11.2
  • 3225Mon
  • 4124Tue40%
  • 3926
  • 3826Thu
  • 4130Fri
daynightWeather update from Harrisburg, Harrisburg International Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Hummelstown for July is 76.3 degrees
  • The lowest monthly average temperature in Hummelstown for February is 31.7 degrees
  • The most monthly precipitation in Hummelstown occurs in September with 5.2 inches
  • The air quality index in Hummelstown is 5% worse than the national average
  • The pollution index in Hummelstown is 307% worse than the national average

Compare Hummelstown, PA Weather

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      Hummelstown 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
      January25°F41°F32°F3.2"
      February25°F40°F32°F3.0"
      March33°F52°F42°F3.2"
      April44°F65°F54°F4.0"
      May52°F74°F62°F4.0"
      June64°F83°F73°F5.1"
      July67°F86°F76°F5.1"
      August67°F85°F75°F3.5"
      September59°F77°F67°F5.2"
      October47°F66°F55°F4.2"
      November38°F55°F45°F3.2"
      December28°F42°F35°F5.1"

      Hummelstown 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.
      IndexHummelstownPennsylvaniaNational
      Air quality index444542
      Pollution index11,091,2004,584,8052,726,193

      Hummelstown air quality

      MeasurementTotal
      Days measured365
      Days with good air quality252
      Days with moderate air quality107
      Days w/ poor A.Q. for sensitive groups5
      Days with unhealthy air quality1

      Air quality details

      PollutantTotal
      Arsenic0.010%
      Benzene0.140%
      Carbon Tetrachloride0.030%
      Lead0.310%
      Mercury0.004%

      Average monthly Hummelstown temperature with heat index

      Hummelstown monthly precipitation with daily maximum

      Hummelstown monthly snow depth with daily maximum

      Hummelstown monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Falmouth, PA5694118.0%
      Manchester, PA2,6804118.0%
      Mount Wolf, PA1,4134118.0%
      Rheems, PA2,8364118.0%
      Marietta, PA2,6164118.0%
      Hummelstown, PA4,7324412.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Jackson, AL4,7314216.0%
      Crystal City, MO4,733548.0%
      Bigfork, MT4,7333726.0%
      Flin Flon (Part), MB4,733n/a 
      Hebbronville, TX4,7304118.0%
      Hummelstown, PA4,7324412.0%
      Source: The Hummelstown, 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.