TODAY JUL18
TEMPERATURE71
HUMIDITY100
PRESSURE29.82
WIND COND.190 3.4
  • 8456Wed
  • 8158Thu
  • 8359Fri
  • 8161Sat
  • 7765Sun40%50%
daynightWeather update from Willimantic, Windham Airport at

Crystal Lake Average Weather

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
January-8°F72°F28°F3.4"
February2°F60°F29°F3.1"
March3°F72°F36°F2.8"
April24°F94°F51°F4.4"
May28°F93°F58°F3.9"
June39°F99°F69°F5.3"
July49°F97°F74°F6.2"
August47°F100°F72°F4.1"
September37°F95°F65°F3.2"
October23°F90°F53°F6.9"
November13°F75°F44°F3.7"
December-2°F67°F32°F4.3"

Did you know?

  • The highest monthly average temperature in Crystal Lake for July is 74 degrees.
  • The lowest monthly average temperature in Crystal Lake for January is 28 degrees.
  • The most monthly precipitation in Crystal Lake occurs in October with 6.9 inches.
  • The air quality index in Crystal Lake is 21% better than the national average.
  • The pollution index in Crystal Lake is 44% better than the national average.

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Compare Crystal Lake, CT Weather To Other Cities

Crystal Lake 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.
IndexCrystal LakeConnecticutNational
Air quality index394350
Pollution index2,806,1507,127,5315,066,862

Crystal Lake air quality information

MeasurementTotal
Days measured365
Days with good air quality259
Days with moderate air quality103
Days w/ poor A.Q. for sensitive groups3
Days with unhealthy air quality

Crystal Lake air quality information

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

Average monthly Crystal Lake temperature with heat index

Crystal Lake monthly precipitation with daily maximum

Crystal Lake monthly snow depth with daily maximum

Crystal Lake monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Coventry Lake, CT3,1663334%
Mansfield Center, CT9693334%
South Coventry, CT1,1423334%
Storrs, CT16,0593334%
Fiskdale, MA2,4053824%
Crystal Lake, CT2,0683922%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Blacksburg, SC2,0683628%
Epworth, IA2,0683236%
Belington, WV2,0683432%
Brice Prairie, WI2,0684020%
Erma, NJ2,0673138%
Crystal Lake, CT2,0683922%
Source: The Crystal Lake, 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.