TODAY NOV25
TEMPERATURE44
HUMIDITY51
PRESSURE101250
WIND COND.290 22.3
  • 5138Mon
  • 5834Tue100%
  • 4836Wed
  • 513750%60%
  • 4828Fri30%30%
daynightWeather update from Westerly, Westerly State Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Westerly for August is 71.4 degrees
  • The lowest monthly average temperature in Westerly for February is 28.7 degrees
  • The most monthly precipitation in Westerly occurs in April with 10.1 inches
  • The air quality index in Westerly is 12% better than the national average
  • The pollution index in Westerly is 9% worse than the national average

Compare Westerly, RI Weather

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      Westerly 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°F31°F5.1"
      February21°F37°F29°F3.7"
      March26°F44°F36°F7.9"
      April36°F55°F46°F10.1"
      May46°F65°F55°F5.8"
      June57°F75°F65°F4.6"
      July62°F80°F70°F3.4"
      August63°F81°F71°F4.1"
      September57°F76°F66°F5.3"
      October49°F65°F56°F9.3"
      November35°F54°F45°F6.2"
      December26°F41°F33°F5.6"

      Westerly 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.
      IndexWesterlyRhode IslandNational
      Air quality index374542
      Pollution index2,960,7903,440,2592,726,193

      Westerly air quality

      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

      Air quality details

      PollutantTotal
      Arsenic0.003%
      Benzene0.030%
      Carbon Tetrachloride0.010%
      Lead0.020%
      Mercury0.005%

      Average monthly Westerly temperature with heat index

      Westerly monthly precipitation with daily maximum

      Westerly monthly snow depth with daily maximum

      Westerly monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Mashantucket, CT2253726.0%
      Old Mystic, CT3,3023726.0%
      Charlestown, RI1,3923726.0%
      Misquamicut, RI3783726.0%
      Noank, CT1,4543726.0%
      Westerly, RI17,8423726.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Radford, VA17,8334118.0%
      Jenison, MI17,8513824.0%
      El Dorado, AR17,8263530.0%
      Canby, OR17,8603824.0%
      Amsterdam, NY17,8233726.0%
      Westerly, RI17,8423726.0%
      Source: The Westerly, RI 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.