TODAY MAY13
TEMPERATURE52
HUMIDITY54
PRESSURE30.15
WIND COND.330 7.6
  • 6647Thu
  • 7148Fri
  • 7249Sat
  • 7249Sun
  • 7151Mon
daynightWeather update from Groton / New London, Groton / New London Airport at

Key findings

  • The highest monthly average temperature in Mashantucket for July is 72.2 degrees
  • The lowest monthly average temperature in Mashantucket for January is 31.5 degrees
  • The most monthly precipitation in Mashantucket occurs in October with 4.4 inches
  • The air quality index in Mashantucket is 26% better than the national average
  • The pollution index in Mashantucket is 45% better than the national average

Compare Mashantucket, CT Weather

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      Mashantucket 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"

      Mashantucket 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.
      IndexMashantucketConnecticutNational
      Air quality index374350
      Pollution index2,806,1507,127,5315,066,862

      Mashantucket 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

      Mashantucket air quality information

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

      Average monthly Mashantucket temperature with heat index

      Mashantucket monthly precipitation with daily maximum

      Mashantucket monthly snow depth with daily maximum

      Mashantucket monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Norwich, CT40,0573726%
      Gales Ferry, CT1,0053726%
      Bradford, RI1,1933726%
      New London, CT27,2183726%
      Long Hill, CT4,4623726%
      Mashantucket, CT2313726%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      East Salem, PA2314412%
      Eastport, MI2313628%
      Beyerville, AZ2313138%
      Atmautluak, AK2313138%
      Bee, NE2313138%
      Mashantucket, CT2313726%
      Source: The Mashantucket, 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.