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Key findings

  • The highest monthly average temperature in Norwich for July is 73.5 degrees
  • The lowest monthly average temperature in Norwich for January is 28.7 degrees
  • The most monthly precipitation in Norwich occurs in June with 5 inches
  • The air quality index in Norwich is 26% better than the national average
  • The pollution index in Norwich is 45% better than the national average

Compare Norwich, CT Weather

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      Norwich 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
      January19°F39°F29°F2.7"
      February19°F40°F29°F3.0"
      March28°F49°F38°F3.5"
      April38°F62°F50°F4.0"
      May48°F73°F60°F3.3"
      June57°F79°F68°F5.0"
      July63°F85°F74°F3.9"
      August60°F82°F71°F4.1"
      September54°F77°F65°F3.7"
      October43°F66°F54°F4.4"
      November33°F54°F43°F3.4"
      December26°F44°F34°F4.0"

      Norwich 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.
      IndexNorwichConnecticutNational
      Air quality index374350
      Pollution index2,806,1507,127,5315,066,862

      Norwich 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

      Norwich air quality information

      PollutantTotal
      Arsenic0.004%
      Benzene0.030%
      Carbon Tetrachloride0.010%
      Lead0.040%
      Mercury0.010%

      Average monthly Norwich temperature with heat index

      Norwich monthly precipitation with daily maximum

      Norwich monthly snow depth with daily maximum

      Norwich monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Wauregan, CT1,3463334%
      Willimantic, CT17,3393334%
      South Windham, CT1,3303334%
      Colchester, CT4,4753334%
      South Coventry, CT1,1423334%
      Norwich, CT40,0573726%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Linton Hall, VA40,026476%
      Meridian, MS40,0943628%
      Sherman, TX40,112325550%
      Florence, AL39,9383726%
      San Gabriel, CA40,2007244%
      Norwich, CT40,0573726%
      Source: The Norwich, 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.