TODAY NOV09
TEMPERATURE47
HUMIDITY46
PRESSURE101900
WIND COND.330 27.7
  • 5140Sat
  • 5854Sun80%
  • 665090%
  • 5841Tue
  • 5146Wed
daynightWeather update from Bridgeport, Sikorsky Memorial Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Norwalk for July is 74.5 degrees
  • The lowest monthly average temperature in Norwalk for January is 30.4 degrees
  • The most monthly precipitation in Norwalk occurs in June with 5.1 inches
  • The air quality index in Norwalk is 2% worse than the national average
  • The pollution index in Norwalk is 522% worse than the national average

Compare Norwalk, CT Weather

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      Norwalk 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"

      Norwalk 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.
      IndexNorwalkConnecticutNational
      Air quality index434342
      Pollution index16,950,7008,629,8832,726,193

      Norwalk air quality

      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

      Air quality details

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

      Average monthly Norwalk temperature with heat index

      Norwalk monthly precipitation with daily maximum

      Norwalk monthly snow depth with daily maximum

      Norwalk monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Byram, CT4,8554314.0%
      Rye Brook, NY9,5544314.0%
      Cos Cob, CT7,0654314.0%
      Old Greenwich, CT6,9804314.0%
      Stamford, CT130,0574314.0%
      Norwalk, CT88,7554314.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Newmarket, ON88,702n/a 
      Nashua, NH89,0523726.0%
      Conroe, TX88,369524.0%
      Chino, CA89,1708978.0%
      Reading, PA88,3334216.0%
      Norwalk, CT88,7554314.0%
      Source: The Norwalk, 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.