TODAY DEC25
TEMPERATURE
HUMIDITY66
PRESSURE102880
WIND COND.310 11.2
  • 3620Thu
  • 3827Fri
  • 4336Sat30%
  • 4943Sun40%60%
  • 5238Mon60%60%
daynightWeather update from White Plains - Westchester County Airport at
New Real Estate Listings in Greenwich Area
Search Homes for Sale in Greenwich, CT

Weather Quick Facts

  • The highest monthly average temperature in Greenwich for July is 74.5 degrees
  • The lowest monthly average temperature in Greenwich for January is 30.4 degrees
  • The most monthly precipitation in Greenwich occurs in June with 5.1 inches
  • The air quality index in Greenwich is 2% worse than the national average
  • The pollution index in Greenwich is 522% worse than the national average

Compare Greenwich, CT Weather

      vs
      How would you rate the weather in Greenwich?
      Write a review to give others more information about this area.
      How would you rate the air quality in Greenwich?
      Write a review to give others more information about this area.
      See all Greenwich poll results

      Greenwich 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°F39°F30°F3.0"
      February23°F40°F31°F2.6"
      March30°F49°F39°F3.5"
      April41°F62°F50°F4.2"
      May50°F71°F60°F4.2"
      June60°F79°F69°F5.1"
      July66°F84°F74°F4.4"
      August64°F82°F72°F4.2"
      September57°F77°F66°F4.3"
      October47°F65°F55°F5.1"
      November37°F54°F45°F3.1"
      December29°F44°F36°F4.5"

      Greenwich 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.
      IndexGreenwichConnecticutNational
      Air quality index434342
      Pollution index16,950,7008,629,8832,726,193

      Greenwich air quality

      MeasurementTotal
      Days measured365
      Days with good air quality262
      Days with moderate air quality82
      Days w/ poor A.Q. for sensitive groups18
      Days with unhealthy air quality3

      Air quality details

      PollutantTotal
      Arsenic0.030%
      Benzene0.140%
      Carbon Tetrachloride0.070%
      Lead0.080%
      Mercury0.030%

      Average monthly Greenwich temperature with heat index

      Greenwich monthly precipitation with daily maximum

      Greenwich monthly snow depth with daily maximum

      Greenwich monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Croton-on-Hudson, NY8,1213628.0%
      Glenville, CT2,9764314.0%
      Darien, CT21,5194314.0%
      Riverside, CT8,8554314.0%
      Armonk, NY4,4404314.0%
      Greenwich, CT12,9674314.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Lynnfield, MA12,9684314.0%
      Claremont, NH12,9693432.0%
      Forest Hill, TX12,964512.0%
      El Sobrante CDP (Contra Costa County), CA12,9638978.0%
      El Dorado, KS12,9764020.0%
      Greenwich, CT12,9674314.0%
      Source: The Greenwich, CT 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.