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Key findings

  • The highest monthly average temperature in Collinsville for July is 75 degrees
  • The lowest monthly average temperature in Collinsville for January is 28 degrees
  • The most monthly precipitation in Collinsville occurs in October with 5.9 inches
  • The air quality index in Collinsville is 26% better than the national average
  • The pollution index in Collinsville is 55% worse than the national average

Compare Collinsville, CT Weather

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      Collinsville 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
      January18°F38°F28°F3.3"
      February18°F40°F29°F3.6"
      March26°F50°F38°F3.6"
      April37°F65°F50°F4.0"
      May47°F75°F60°F4.0"
      June57°F82°F69°F5.5"
      July63°F88°F75°F4.9"
      August60°F86°F72°F4.9"
      September54°F80°F66°F3.9"
      October43°F67°F54°F5.9"
      November32°F55°F43°F3.2"
      December24°F44°F33°F4.5"

      Collinsville 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.
      IndexCollinsvilleConnecticutNational
      Air quality index374350
      Pollution index7,859,3607,127,5315,066,862

      Collinsville air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality342
      Days with moderate air quality23
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Collinsville air quality information

      PollutantTotal
      Arsenic0.030%
      Benzene0.070%
      Carbon Tetrachloride0.030%
      Lead0.320%
      Mercury0.070%

      Average monthly Collinsville temperature with heat index

      Collinsville monthly precipitation with daily maximum

      Collinsville monthly snow depth with daily maximum

      Collinsville monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Norfolk, CT4913726%
      Winsted, CT7,5353726%
      Thomaston, CT1,8033726%
      Torrington, CT35,2273726%
      New Hartford Center, CT1,4093726%
      Collinsville, CT3,6933726%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Ross, OH3,693548%
      Eastover, NC3,6924118%
      Windsor, NC3,6940100%
      Ajo, AZ3,6967448%
      Lloyd Harbor, NY3,6964314%
      Collinsville, CT3,6933726%
      Source: The Collinsville, 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.