TODAY JUL25
TEMPERATURE63
HUMIDITY97
PRESSURE101660
WIND COND.
  • 7557Thu40%30%
  • 7652Fri
  • 7956Sat
  • 8359Sun
  • 8663Mon
daynightWeather update from Whitefield - Mount Washington Regional Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Bethlehem for July is 66.8 degrees
  • The lowest monthly average temperature in Bethlehem for January is 17.4 degrees
  • The most monthly precipitation in Bethlehem occurs in July with 5.3 inches
  • The air quality index in Bethlehem is 5% better than the national average
  • The pollution index in Bethlehem is 53% better than the national average

Compare Bethlehem, NH Weather

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      Bethlehem 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
      January7°F28°F17°F1.4"
      February8°F29°F18°F1.6"
      March17°F39°F28°F2.0"
      April31°F54°F42°F2.9"
      May42°F67°F54°F4.2"
      June51°F73°F62°F5.1"
      July55°F78°F67°F5.3"
      August53°F76°F64°F4.7"
      September46°F70°F57°F3.2"
      October37°F57°F46°F4.3"
      November26°F45°F34°F2.4"
      December16°F32°F24°F3.0"

      Bethlehem 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.
      IndexBethlehemNew HampshireNational
      Air quality index403442
      Pollution index1,278,4303,959,6182,726,193

      Bethlehem air quality information

      MeasurementTotal
      Days measured324
      Days with good air quality314
      Days with moderate air quality10
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Bethlehem air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.020%
      Carbon Tetrachloride0.002%
      Lead0.010%
      Mercury0.001%

      Average monthly Bethlehem temperature with heat index

      Bethlehem monthly precipitation with daily maximum

      Bethlehem monthly snow depth with daily maximum

      Bethlehem monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Mountain Lakes, NH6433432.0%
      Lisbon, NH8434020.0%
      Littleton, NH4,2944020.0%
      Whitefield, NH1,2024020.0%
      Concord, VT1764020.0%
      Bethlehem, NH1,0614020.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Bluewater, AZ1,0611374.0%
      Claypool, AZ1,0616020.0%
      South Pekin, IL1,0614118.0%
      Marion Center, MA1,0613628.0%
      Highlands, NC1,0614118.0%
      Bethlehem, NH1,0614020.0%
      Source: The Bethlehem, NH 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.