TODAY MAY08
TEMPERATURE50
HUMIDITY63
PRESSURE29.88
WIND COND.110 9.4
  • 5544Sat30%30%
  • 6449Sun80%
  • 6446Mon70%
  • 6243Tue
  • 6546Wed
daynightWeather update from White Plains - Westchester County Airport at

Key findings

  • The highest monthly average temperature in Old Greenwich for July is 74.5 degrees
  • The lowest monthly average temperature in Old Greenwich for January is 30.4 degrees
  • The most monthly precipitation in Old Greenwich occurs in June with 5.1 inches
  • The air quality index in Old Greenwich is 14% better than the national average
  • The pollution index in Old Greenwich is 235% worse than the national average

Compare Old Greenwich, CT Weather

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      Old 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"

      Old 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.
      IndexOld GreenwichConnecticutNational
      Air quality index434350
      Pollution index16,950,7007,127,5315,066,862

      Old Greenwich air quality information

      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

      Old Greenwich air quality information

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

      Average monthly Old Greenwich temperature with heat index

      Old Greenwich monthly precipitation with daily maximum

      Old Greenwich monthly snow depth with daily maximum

      Old Greenwich monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Cove Neck, NY2784314%
      Glenville, CT2,3024314%
      Cos Cob, CT6,5354314%
      Riverside, CT8,2894314%
      Wilton Center, CT6754314%
      Old Greenwich, CT7,0004314%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Russellville, KY6,9984314%
      Pelham, NY6,996512%
      Inwood, FL6,9953628%
      Idabel, OK7,0073922%
      Linwood, NJ7,0093726%
      Old Greenwich, CT7,0004314%
      Source: The Old 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.