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Key findings

  • The highest monthly average temperature in Southport for July is 75.6 degrees
  • The lowest monthly average temperature in Southport for January is 31.9 degrees
  • The most monthly precipitation in Southport occurs in December with 5.4 inches
  • The air quality index in Southport is 14% better than the national average
  • The pollution index in Southport is 522% worse than the national average

Compare Southport, CT Weather

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      Southport 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°F41°F32°F3.3"
      February23°F42°F32°F3.6"
      March30°F50°F39°F4.0"
      April41°F62°F50°F4.3"
      May50°F71°F59°F3.9"
      June60°F80°F69°F4.9"
      July67°F85°F76°F3.5"
      August66°F84°F74°F4.2"
      September59°F78°F68°F3.8"
      October48°F67°F57°F4.7"
      November38°F56°F47°F3.0"
      December29°F46°F38°F5.4"

      Southport 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.
      IndexSouthportConnecticutNational
      Air quality index434350
      Pollution index16,950,7008,629,8832,726,193

      Southport 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

      Southport air quality information

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

      Average monthly Southport temperature with heat index

      Southport monthly precipitation with daily maximum

      Southport monthly snow depth with daily maximum

      Southport monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Ansonia, CT18,9504118.0%
      Derby, CT12,7554118.0%
      Shelton, CT40,9794118.0%
      Orange, CT13,9414118.0%
      Georgetown, CT1,8214314.0%
      Southport, CT1,6944314.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Rossville, IL1,6944216.0%
      Norwood, NY1,6940100.0%
      Guthrie, KY1,6934020.0%
      Lebanon, NJ1,6934118.0%
      Eeyou Istchee Baie-James, QC1,693n/a 
      Southport, CT1,6944314.0%
      Source: The Southport, 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.