TODAY MAY23
TEMPERATURE59
HUMIDITY87
PRESSURE29.87
WIND COND.240 4.7
  • 7056Thu
  • 8765Fri
  • 8657Sat40%
  • 6453Sun40%30%
  • 635330%30%
daynightWeather update from Boston, Logan International Airport at

Charlestown Average Weather

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
January-2°F69°F31°F3.4"
February7°F63°F31°F2.9"
March5°F73°F37°F3.0"
April28°F93°F49°F4.0"
May39°F92°F57°F5.3"
June48°F97°F67°F4.4"
July55°F97°F73°F5.1"
August55°F99°F72°F2.8"
September45°F95°F66°F3.0"
October33°F86°F55°F4.6"
November21°F70°F46°F3.8"
December10°F70°F35°F4.0"

Did you know?

  • The highest monthly average temperature in Charlestown for July is 73 degrees.
  • The lowest monthly average temperature in Charlestown for February is 31 degrees.
  • The most monthly precipitation in Charlestown occurs in May with 5.3 inches.
  • The air quality index in Charlestown is 5% better than the national average.
  • The pollution index in Charlestown is 374% worse than the national average.

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Compare Boston, MA Weather To Other Cities

Charlestown 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.
IndexCharlestownBostonMassachusetts
Air quality index474740
Pollution index24,018,00024,018,00012,377,839

Charlestown 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

Charlestown air quality information

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

Average monthly Charlestown temperature with heat index

Charlestown monthly precipitation with daily maximum

Charlestown monthly snow depth with daily maximum

Charlestown monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Danvers, MA27,558476%
Hanscom AFB, MA1,943476%
Lynn, MA92,074476%
Medfield, MA6,575476%
Milton, MA27,351476%
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 Charlestown, 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.