TODAY OCT18
TEMPERATURE41
HUMIDITY46
PRESSURE30.29
WIND COND.
  • 6050Fri
  • 6143Sat30%
  • 5036Sun
  • 5143Mon
  • 5742Tue
daynightWeather update from White Plains - Westchester County Airport at
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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"

Did you know?

  • The highest monthly average temperature in Greenwich for July is 74 degrees.
  • The lowest monthly average temperature in Greenwich for January is 30 degrees.
  • The most monthly precipitation in Greenwich occurs in June with 5.1 inches.
  • The air quality index in Greenwich is 5% better than the national average.
  • The pollution index in Greenwich is 234% worse than the national average.

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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 index474350
Pollution index16,950,7007,127,5315,066,862

Greenwich air quality information

MeasurementTotal
Days measured365
Days with good air quality200
Days with moderate air quality146
Days w/ poor A.Q. for sensitive groups18
Days with unhealthy air quality1

Greenwich air quality information

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

City, StatePopulationAir Quality IndexNational Avg.
Croton-on-Hudson, NY8,2093628%
Cannondale, CT92476%
Glenville, CT2,302476%
Riverside, CT8,289476%
Chappaqua, NY1,328476%
Greenwich, CT13,429476%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Piney Green, NC13,4273138%
Waianae, HI13,4263040%
Stony Brook, NY13,437476%
Brainerd, MN13,4402942%
Hot Springs Village, AR13,4433628%
Greenwich, CT13,429476%
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.