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Key findings

  • The highest monthly average temperature in Old Tappan for July is 78 degrees
  • The lowest monthly average temperature in Old Tappan for January is 32.7 degrees
  • The most monthly precipitation in Old Tappan occurs in June with 5.3 inches
  • The air quality index in Old Tappan is 3% worse than the national average
  • The pollution index in Old Tappan is 158% worse than the national average

Compare Old Tappan, NJ Weather

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      Old Tappan 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°F42°F33°F4.2"
      February25°F43°F34°F3.6"
      March33°F52°F42°F3.9"
      April44°F66°F54°F4.4"
      May53°F75°F63°F4.9"
      June63°F84°F72°F5.3"
      July69°F89°F78°F4.5"
      August66°F86°F76°F5.0"
      September60°F81°F69°F3.5"
      October49°F69°F58°F4.8"
      November38°F58°F47°F3.1"
      December31°F47°F38°F5.0"

      Old Tappan 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.
      IndexOld TappanNew JerseyNational
      Air quality index514550
      Pollution index7,043,2007,246,8912,726,193

      Old Tappan air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality169
      Days with moderate air quality180
      Days w/ poor A.Q. for sensitive groups16
      Days with unhealthy air quality0

      Old Tappan air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.050%
      Carbon Tetrachloride0.020%
      Lead0.030%
      Mercury0.020%

      Average monthly Old Tappan temperature with heat index

      Old Tappan monthly precipitation with daily maximum

      Old Tappan monthly snow depth with daily maximum

      Old Tappan monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Croton-on-Hudson, NY8,2093628.0%
      Mount Ivy, NY6,7923628.0%
      Crugers, NY1,4083628.0%
      Stony Point, NY13,0163628.0%
      Pomona, NY3,4683628.0%
      Old Tappan, NJ5,942512.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Caruthersville, MO5,9412648.0%
      Piedmont, SC5,940468.0%
      Watchung, NJ5,944512.0%
      Rincon Valley, AZ5,938476.0%
      Steelton, PA5,9384412.0%
      Old Tappan, NJ5,942512.0%
      Source: The Old Tappan, 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.