TODAY OCT21
TEMPERATURE59
HUMIDITY51
PRESSURE29.57
WIND COND.260 9.2
  • 4931Sun30%
  • 5041Mon
  • 5741Tue40%
  • 5235Wed
  • 4632Thu
daynightWeather update from Boston, Logan International Airport at
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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"

Did you know?

  • The highest monthly average temperature in Boston for July is 74 degrees.
  • The lowest monthly average temperature in Boston for January is 31 degrees.
  • The most monthly precipitation in Boston occurs in October with 5 inches.
  • The air quality index in Boston is 5% better than the national average.
  • The pollution index in Boston is 374% worse than the national average.

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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 index474050
Pollution index24,018,00012,377,8395,066,862

Boston air quality information

MeasurementTotal
Days measured365
Days with good air quality223
Days with moderate air quality137
Days w/ poor A.Q. for sensitive groups5
Days with unhealthy air quality

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

City, StatePopulationAir Quality IndexNational Avg.
Braintree Town, MA37,066476%
Chelsea, MA38,244476%
Dover, MA2,453476%
Hull, MA10,437476%
Malden, MA60,732476%
Boston, MA658,279476%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Washington, DC659,009492%
Memphis, TN655,8574412%
Denver, CO663,303548%
Seattle, WA668,849492%
Nashville, TN643,7714510%
Boston, MA658,279476%
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.