TODAY MAR19
TEMPERATURE36
HUMIDITY73
PRESSURE100240
WIND COND.280 25.9
  • 4634Tue
  • 5231Wed30%
  • 4225Thu
  • 4329Fri
  • 4630Sat50%40%
daynightWeather update from Boston, Logan International Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Boston for July is 74.2 degrees
  • The lowest monthly average temperature in Boston for January is 30.7 degrees
  • The most monthly precipitation in Boston occurs in October with 5 inches
  • The air quality index in Boston is 2% worse than the national average
  • The pollution index in Boston is 781% worse than the national average

Compare Boston, MA Weather

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      Boston 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
      January23°F40°F31°F3.2"
      February22°F41°F31°F3.2"
      March29°F48°F38°F3.8"
      April40°F61°F49°F3.7"
      May50°F69°F58°F3.8"
      June59°F78°F67°F4.7"
      July66°F85°F74°F4.1"
      August64°F83°F73°F3.5"
      September58°F77°F66°F3.0"
      October48°F66°F56°F5.0"
      November37°F55°F45°F3.3"
      December28°F45°F36°F4.6"

      Boston 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.
      IndexBostonMassachusettsNational
      Air quality index434042
      Pollution index24,018,0008,399,6102,726,193

      Boston air quality information

      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

      Boston air quality information

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

      Average monthly Boston temperature with heat index

      Boston monthly precipitation with daily maximum

      Boston monthly snow depth with daily maximum

      Boston monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Braintree Town, MA37,1964314.0%
      Dover, MA2,5184314.0%
      Millis-Clicquot, MA4,4554314.0%
      North Scituate, MA5,3724314.0%
      Southfield, MA04314.0%
      Boston, MA689,3264314.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Vancouver, BC694,440n/a 
      El Paso, TX679,879536.0%
      Washington, DC701,974476.0%
      Detroit, MI672,3515612.0%
      Nashville, TN667,0704510.0%
      Boston, MA689,3264314.0%
      Source: The Boston, 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.