TODAY MAY05
TEMPERATURE52
HUMIDITY97
PRESSURE29.64
WIND COND.40 7.6
  • 6343Thu
  • 5843Fri
  • 5643Sat30%
  • 6045Sun30%
  • 5844Mon40%
daynightWeather update from Westerly, Westerly State Airport at

Key findings

  • The highest monthly average temperature in Stonington for August is 71.4 degrees
  • The lowest monthly average temperature in Stonington for February is 28.7 degrees
  • The most monthly precipitation in Stonington occurs in April with 10.1 inches
  • The air quality index in Stonington is 26% better than the national average
  • The pollution index in Stonington is 19% better than the national average

Compare Stonington, CT Weather

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      Stonington 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°F31°F5.1"
      February21°F37°F29°F3.7"
      March26°F44°F36°F7.9"
      April36°F55°F46°F10.1"
      May46°F65°F55°F5.8"
      June57°F75°F65°F4.6"
      July62°F80°F70°F3.4"
      August63°F81°F71°F4.1"
      September57°F76°F66°F5.3"
      October49°F65°F56°F9.3"
      November35°F54°F45°F6.2"
      December26°F41°F33°F5.6"

      Stonington 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.
      IndexStoningtonConnecticutNational
      Air quality index374350
      Pollution index4,117,2507,127,5315,066,862

      Stonington 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

      Stonington air quality information

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

      Average monthly Stonington temperature with heat index

      Stonington monthly precipitation with daily maximum

      Stonington monthly snow depth with daily maximum

      Stonington monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Fishers Island, NY3033726%
      Carolina, RI7543726%
      Conning Towers Nautilus Park, CT9,6063726%
      Ashaway, RI1,1113726%
      Groton, CT9,2403726%
      Stonington, CT9733726%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Primghar, IA9733530%
      Mora, NM9731570%
      Silkworth, PA9733824%
      Lake Waukomis, MO973476%
      Funny River, AK9723138%
      Stonington, CT9733726%
      Source: The Stonington, 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.