TODAY NOV25
TEMPERATURE45
HUMIDITY49
PRESSURE100880
WIND COND.280 16.6
  • 5134Mon
  • 5035Tue100%
  • 4733Wed
  • 483640%60%
  • 4629Fri30%
daynightWeather update from Norwood, Norwood Memorial Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Wellesley for July is 73.3 degrees
  • The lowest monthly average temperature in Wellesley for January is 29.1 degrees
  • The most monthly precipitation in Wellesley occurs in October with 4.9 inches
  • The air quality index in Wellesley is 2% worse than the national average
  • The pollution index in Wellesley is 177% worse than the national average

Compare Wellesley, MA Weather

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      Wellesley 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°F39°F29°F3.1"
      February18°F40°F29°F2.8"
      March27°F48°F37°F3.2"
      April37°F61°F49°F3.7"
      May46°F71°F59°F3.4"
      June55°F79°F67°F4.5"
      July61°F85°F73°F3.6"
      August57°F83°F71°F3.6"
      September51°F77°F64°F3.2"
      October41°F66°F53°F4.9"
      November32°F55°F43°F3.6"
      December25°F45°F34°F4.0"

      Wellesley 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.
      IndexWellesleyMassachusettsNational
      Air quality index434042
      Pollution index7,556,3208,399,6102,726,193

      Wellesley 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
      Arsenic0.010%
      Benzene0.070%
      Carbon Tetrachloride0.040%
      Lead0.010%
      Mercury0.040%

      Average monthly Wellesley temperature with heat index

      Wellesley monthly precipitation with daily maximum

      Wellesley monthly snow depth with daily maximum

      Wellesley monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Milford, MA26,0724020.0%
      Cordaville, MA2,8844020.0%
      Hudson, MA15,2224020.0%
      Framingham, MA72,8464020.0%
      Marlborough, MA39,6634020.0%
      Wellesley, MA28,7474314.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Summerlin South, NV28,716548.0%
      Forest Hills, MI28,6903824.0%
      Courtenay, BC28,804n/a 
      Vero Beach South, FL28,6763628.0%
      Bella Vista, AR28,8194412.0%
      Wellesley, MA28,7474314.0%
      Source: The Wellesley, 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.