TODAY MAY18
TEMPERATURE64
HUMIDITY88
PRESSURE101523.93
WIND COND.
  • 7356Sun
  • 7754Mon
  • 8056Tue
  • 8263Wed
  • 8160Thu40%
daynightWeather update from Brandywine Regional Airport at
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Weather Quick Facts

  • The highest monthly average temperature in West Chester for July is 75 degrees
  • The lowest monthly average temperature in West Chester for February is 29.3 degrees
  • The most monthly precipitation in West Chester occurs in April with 11.6 inches
  • The air quality index in West Chester is 21% worse than the national average
  • The pollution index in West Chester is 20% better than the national average

Compare West Chester, PA Weather

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      West Chester 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°F33°F5.6"
      February21°F38°F29°F4.6"
      March29°F50°F39°F6.9"
      April40°F63°F51°F11.6"
      May48°F73°F61°F2.5"
      June61°F83°F72°F4.5"
      July65°F86°F75°F7.2"
      August65°F86°F75°F6.7"
      September56°F82°F69°F1.6"
      October49°F70°F59°F9.8"
      November35°F55°F44°F4.7"
      December26°F41°F33°F5.6"

      West Chester 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.
      IndexWest ChesterPennsylvaniaNational
      Air quality index514542
      Pollution index2,169,6004,584,8052,726,193

      West Chester 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

      West Chester air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.030%
      Carbon Tetrachloride0.002%
      Lead0.010%
      Mercury0.004%

      Average monthly West Chester temperature with heat index

      West Chester monthly precipitation with daily maximum

      West Chester monthly snow depth with daily maximum

      West Chester monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Thorndale, PA3,7194216.0%
      Exton, PA6,0794216.0%
      Coatesville, PA13,0964216.0%
      Modena, PA6554216.0%
      Elverson, PA1,3694216.0%
      West Chester, PA20,033512.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Amherst Center, MA20,0374020.0%
      Punta Gorda, FL20,0443628.0%
      Miamisburg, OH20,020476.0%
      Shelby, NC20,0463628.0%
      Elmwood Park, NJ20,019512.0%
      West Chester, PA20,033512.0%
      Source: The West Chester, 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.