TODAY DEC03
TEMPERATURE39
HUMIDITY46
PRESSURE102540
WIND COND.
  • 3932Wed
  • 3626Thu60%
  • 3623Fri
  • 3625Sat
  • 4833Sun
daynightWeather update from Lancaster, Lancaster Airport at
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Weather Quick Facts

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

Compare Cornwall, PA Weather

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      Cornwall 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"

      Cornwall 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.
      IndexCornwallPennsylvaniaNational
      Air quality index424542
      Pollution index11,091,2004,584,8052,726,193

      Cornwall air quality

      MeasurementTotal
      Days measured360
      Days with good air quality278
      Days with moderate air quality78
      Days w/ poor A.Q. for sensitive groups4
      Days with unhealthy air quality0

      Air quality details

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

      Average monthly Cornwall temperature with heat index

      Cornwall monthly precipitation with daily maximum

      Cornwall monthly snow depth with daily maximum

      Cornwall monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Bainbridge, PA1,3994118.0%
      Elizabethtown, PA11,4454118.0%
      Rheems, PA2,8364118.0%
      Maytown, PA4,1304118.0%
      Marietta, PA2,6164118.0%
      Cornwall, PA4,3194216.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Chester, MD4,319468.0%
      French Island, WI4,3183530.0%
      Grantley, PA4,3204118.0%
      Riva, MD4,321476.0%
      Barrow, AK4,3163824.0%
      Cornwall, PA4,3194216.0%
      Source: The Cornwall, 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.