TODAY NOV22
TEMPERATURE42
HUMIDITY85
PRESSURE99930
WIND COND.300 18.4
  • 4431Fri50%60%
  • 5237Sat
  • 5330Sun
  • 5841Mon
  • 5732Tue30%
daynightWeather update from Mcguire Air Force Base at
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Weather Quick Facts

  • The highest monthly average temperature in Allentown for August is 75.1 degrees
  • The lowest monthly average temperature in Allentown for February is 30.6 degrees
  • The most monthly precipitation in Allentown occurs in October with 14.4 inches
  • The air quality index in Allentown is 3% better than the national average
  • The pollution index in Allentown is 38% worse than the national average

Compare Allentown, NJ Weather

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      Allentown 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
      January27°F43°F34°F5.5"
      February24°F39°F31°F3.2"
      March31°F51°F40°F6.6"
      April42°F62°F51°F10.1"
      May50°F72°F60°F3.5"
      June63°F82°F71°F10.0"
      July67°F86°F75°F7.7"
      August67°F86°F75°F7.3"
      September59°F81°F69°F4.3"
      October52°F69°F60°F14.4"
      November38°F57°F46°F7.3"
      December28°F43°F35°F5.6"

      Allentown 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.
      IndexAllentownNew JerseyNational
      Air quality index414542
      Pollution index3,756,2707,246,8912,726,193

      Allentown air quality

      MeasurementTotal
      Days measured365
      Days with good air quality280
      Days with moderate air quality83
      Days w/ poor A.Q. for sensitive groups2
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.020%
      Benzene0.040%
      Carbon Tetrachloride0.010%
      Lead0.100%
      Mercury0.001%

      Average monthly Allentown temperature with heat index

      Allentown monthly precipitation with daily maximum

      Allentown monthly snow depth with daily maximum

      Allentown monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Heathcote, NJ7,3894118.0%
      Princeton, NJ31,1614118.0%
      Florence, NJ4,4554118.0%
      Roebling, NJ4,1204118.0%
      Tullytown, PA2,2154118.0%
      Allentown, NJ1,7404118.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Blackwater, AZ1,7407448.0%
      Boronda, CA1,7403726.0%
      Fern Acres, HI1,7401668.0%
      Wilder, ID1,7403628.0%
      Charlotte Hall, MD1,740476.0%
      Allentown, NJ1,7404118.0%
      Source: The Allentown, NJ 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.