TODAY SEP26
TEMPERATURE74
HUMIDITY91
PRESSURE30.03
WIND COND.200 9.2
  • 6454Thu
  • 6655Fri20%
  • 7049Sat
  • 6350Sun
  • 6453Mon
daynightWeather update from Boston, Logan International Airport at
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Somerville 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 Somerville for July is 74 degrees.
  • The lowest monthly average temperature in Somerville for January is 31 degrees.
  • The most monthly precipitation in Somerville occurs in October with 5 inches.
  • The air quality index in Somerville is 5% better than the national average.
  • The pollution index in Somerville is 374% worse than the national average.

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Somerville 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.
IndexSomervilleMassachusettsNational
Air quality index474050
Pollution index24,018,00012,377,8395,066,862

Somerville 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

Somerville air quality information

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

Average monthly Somerville temperature with heat index

Somerville monthly precipitation with daily maximum

Somerville monthly snow depth with daily maximum

Somerville monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Waltham, MA62,699476%
Wilmington, MA23,310476%
Belmont, MA25,555476%
Brookline, MA59,180476%
Cochituate, MA6,940476%
Somerville, MA79,507476%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Napa, CA79,5674314%
Tustin, CA79,3968570%
Lawrence, MA79,3373628%
New Rochelle, NY79,299536%
Parma, OH80,0885510%
Somerville, MA79,507476%
Source: The Somerville, 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.