TODAY MAR19
TEMPERATURE34
HUMIDITY61
PRESSURE101050
WIND COND.280 16.6
  • 4636Tue
  • 5228Wed20%
  • 4524Thu
  • 4637Fri50%
  • 5128Sat60%30%
daynightWeather update from Lancaster, Lancaster Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Mount Joy for July is 75.4 degrees
  • The lowest monthly average temperature in Mount Joy for January is 30.8 degrees
  • The most monthly precipitation in Mount Joy occurs in June with 5.4 inches
  • The air quality index in Mount Joy is 7% worse than the national average
  • The pollution index in Mount Joy is 307% worse than the national average

Compare Mount Joy, PA Weather

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      Mount Joy 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°F40°F31°F2.4"
      February22°F41°F31°F2.2"
      March31°F52°F41°F2.8"
      April41°F65°F52°F3.6"
      May51°F74°F62°F3.7"
      June61°F82°F72°F5.4"
      July65°F86°F75°F4.6"
      August62°F84°F73°F3.4"
      September56°F78°F67°F4.7"
      October45°F66°F55°F4.5"
      November35°F54°F44°F2.3"
      December28°F45°F36°F3.3"

      Mount Joy 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.
      IndexMount JoyPennsylvaniaNational
      Air quality index454542
      Pollution index11,091,2004,584,8052,726,193

      Mount Joy air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality238
      Days with moderate air quality117
      Days w/ poor A.Q. for sensitive groups9
      Days with unhealthy air quality1

      Mount Joy air quality information

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

      Average monthly Mount Joy temperature with heat index

      Mount Joy monthly precipitation with daily maximum

      Mount Joy monthly snow depth with daily maximum

      Mount Joy monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Grantley, PA4,3204118.0%
      Tyler Run, PA1,9314118.0%
      Yoe, PA9804118.0%
      Hallam, PA2,6424118.0%
      North York, PA2,2774118.0%
      Mount Joy, PA8,2044510.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Kirkland Lake, ON8,204n/a 
      Westlake Village, CA8,203468.0%
      Carl Junction, MO8,2023726.0%
      North Patchogue, NY8,2024314.0%
      Lockwood, MT8,2062158.0%
      Mount Joy, PA8,2044510.0%
      Source: The Mount Joy, 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.