TODAY NOV07
TEMPERATURE60
HUMIDITY69
PRESSURE101490
WIND COND.240 11.2
  • 6238Fri
  • 5131Sat
  • 5747Sun60%
  • 644340%
  • 5738Tue
daynightWeather update from Laurence G Hanscom Field Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Belmont for August is 72.2 degrees
  • The lowest monthly average temperature in Belmont for February is 25.5 degrees
  • The most monthly precipitation in Belmont occurs in October with 9.5 inches
  • The air quality index in Belmont is 2% worse than the national average
  • The pollution index in Belmont is 781% worse than the national average

Compare Belmont, MA Weather

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      Belmont 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
      January19°F38°F27°F5.0"
      February16°F37°F25°F4.6"
      March24°F45°F34°F7.3"
      April36°F60°F47°F9.2"
      May45°F68°F56°F7.8"
      June56°F81°F67°F3.2"
      July61°F85°F72°F4.2"
      August61°F86°F72°F4.0"
      September53°F79°F65°F3.1"
      October45°F65°F54°F9.5"
      November31°F53°F41°F4.7"
      December20°F38°F29°F5.5"

      Belmont 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.
      IndexBelmontMassachusettsNational
      Air quality index434042
      Pollution index24,018,0008,399,6102,726,193

      Belmont air quality

      MeasurementTotal
      Days measured365
      Days with good air quality291
      Days with moderate air quality73
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.030%
      Benzene0.220%
      Carbon Tetrachloride0.100%
      Lead0.280%
      Mercury0.130%

      Average monthly Belmont temperature with heat index

      Belmont monthly precipitation with daily maximum

      Belmont monthly snow depth with daily maximum

      Belmont monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Maynard, MA10,9004020.0%
      Littleton Common, MA3,3704020.0%
      Framingham, MA72,8464020.0%
      Braintree Town, MA37,1964314.0%
      Dover, MA2,5184314.0%
      Belmont, MA26,1584314.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      University Park, FL26,1504118.0%
      Stevens Point, WI26,1443432.0%
      Troy, OH26,176476.0%
      Sun City Center, FL26,1384314.0%
      West Whittier-Los Nietos, CA26,1217244.0%
      Belmont, MA26,1584314.0%
      Source: The Belmont, MA 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.