TODAY NOV25
TEMPERATURE40
HUMIDITY83
PRESSURE101660
WIND COND.280 7.6
  • 5440Mon
  • 5933Tue70%
  • 4934Wed
  • 503360%60%
  • 4626Fri40%
daynightWeather update from Trenton, Mercer County Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Rocky Hill for July is 77 degrees
  • The lowest monthly average temperature in Rocky Hill for January is 32.7 degrees
  • The most monthly precipitation in Rocky Hill occurs in June with 5.3 inches
  • The air quality index in Rocky Hill is 3% better than the national average
  • The pollution index in Rocky Hill is 22% worse than the national average

Compare Rocky Hill, NJ Weather

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      Rocky Hill 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°F3.3"
      February25°F43°F34°F2.4"
      March33°F53°F42°F3.4"
      April43°F66°F54°F3.8"
      May52°F75°F63°F3.9"
      June62°F83°F72°F5.3"
      July67°F88°F77°F5.1"
      August65°F85°F75°F4.7"
      September59°F79°F68°F3.5"
      October48°F68°F57°F4.2"
      November37°F57°F46°F2.9"
      December31°F47°F38°F4.3"

      Rocky Hill 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.
      IndexRocky HillNew JerseyNational
      Air quality index414542
      Pollution index3,313,9207,246,8912,726,193

      Rocky Hill 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
      Arsenic0.350%
      Benzene0.020%
      Carbon Tetrachloride0.004%
      Lead0.350%
      Mercury0.340%

      Average monthly Rocky Hill temperature with heat index

      Rocky Hill monthly precipitation with daily maximum

      Rocky Hill monthly snow depth with daily maximum

      Rocky Hill monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Clyde, NJ2124118.0%
      Griggstown, NJ8584118.0%
      Kendall Park, NJ9,8524118.0%
      Princeton, NJ31,1614118.0%
      White House Station, NJ3,8384118.0%
      Rocky Hill, NJ6554118.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Queen Valley, AZ6557448.0%
      Penney Farms, FL6551766.0%
      Crooked Creek, GA6553824.0%
      Allendale, IL6553628.0%
      Hardin, MO655476.0%
      Rocky Hill, NJ6554118.0%
      Source: The Rocky Hill, 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.