TODAY MAR09
TEMPERATURE37
HUMIDITY76
PRESSURE30.33
WIND COND.210 16.6
  • 5334Tue
  • 4740Wed
  • 5447Thu
  • 5740Fri30%
  • 4331Sat
daynightWeather update from Groton / New London, Groton / New London Airport at

Key findings

  • The highest monthly average temperature in New London for July is 72 degrees
  • The lowest monthly average temperature in New London for January is 32 degrees
  • The most monthly precipitation in New London occurs in October with 4.4 inches
  • The air quality index in New London is 26% better than the national average
  • The pollution index in New London is 19% better than the national average

Compare New London, CT Weather

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      New London 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°F32°F2.5"
      February23°F40°F32°F2.1"
      March30°F47°F38°F3.3"
      April39°F58°F48°F3.1"
      May48°F66°F57°F3.6"
      June58°F75°F66°F3.6"
      July65°F81°F72°F2.8"
      August63°F80°F71°F3.0"
      September57°F75°F66°F3.3"
      October47°F65°F56°F4.4"
      November37°F55°F46°F2.9"
      December29°F46°F37°F3.4"

      New London 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.
      IndexNew LondonConnecticutNational
      Air quality index374350
      Pollution index4,117,2507,127,5315,066,862

      New London air quality information

      MeasurementTotal
      Days measured364
      Days with good air quality323
      Days with moderate air quality34
      Days w/ poor A.Q. for sensitive groups7
      Days with unhealthy air quality0

      New London air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.050%
      Carbon Tetrachloride0.010%
      Lead0.010%
      Mercury0.010%

      Average monthly New London temperature with heat index

      New London monthly precipitation with daily maximum

      New London monthly snow depth with daily maximum

      New London monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Fishers Island, NY3033726%
      Mashantucket, CT2313726%
      Old Mystic, CT3,4033726%
      Groton Long Point, CT4773726%
      Old Saybrook Center, CT1,8303726%
      New London, CT27,2183726%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Deer Park, NY27,2234314%
      Anderson, SC27,2063138%
      West Islip, NY27,2314314%
      Lindenhurst, NY27,234512%
      Glen Cove, NY27,246512%
      New London, CT27,2183726%
      Source: The New London, 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.