TODAY DEC23
TEMPERATURE11
HUMIDITY58
PRESSURE103490
WIND COND.330 13
  • 2516Mon20%
  • 3314Tue60%
  • 3419
  • 3516Thu
  • 3617Fri
daynightWeather update from Portland, Portland International Jetport at
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Weather Quick Facts

  • The highest monthly average temperature in Rosemont for July is 70.1 degrees
  • The lowest monthly average temperature in Rosemont for January is 25 degrees
  • The most monthly precipitation in Rosemont occurs in October with 6.9 inches
  • The air quality index in Rosemont is 5% better than the national average
  • The pollution index in Rosemont is 25% better than the national average

Compare Portland, ME Weather

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      Rosemont 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
      January15°F36°F25°F3.2"
      February15°F37°F26°F4.2"
      March24°F44°F34°F4.0"
      April34°F57°F45°F5.0"
      May44°F67°F55°F4.5"
      June53°F75°F63°F5.8"
      July60°F82°F70°F4.3"
      August58°F80°F69°F4.4"
      September51°F74°F62°F4.1"
      October41°F62°F51°F6.9"
      November31°F52°F41°F4.4"
      December21°F40°F30°F5.3"

      Rosemont 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.
      IndexRosemontPortlandMaine
      Air quality index404033
      Pollution index2,043,7002,043,7003,417,521

      Rosemont air quality

      MeasurementTotal
      Days measured365
      Days with good air quality308
      Days with moderate air quality56
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.030%
      Benzene0.020%
      Carbon Tetrachloride0.003%
      Lead0.030%
      Mercury0.002%

      Average monthly Rosemont temperature with heat index

      Rosemont monthly precipitation with daily maximum

      Rosemont monthly snow depth with daily maximum

      Rosemont monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Gorham, ME7,3224020.0%
      South Windham, ME1,0224020.0%
      Cousins Island, ME5214020.0%
      Freeport, ME1,8794020.0%
      Yarmouth, ME5,7524020.0%
      Portland, ME66,7064020.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      West Des Moines, IA66,7243922.0%
      Redondo Beach, CA66,6637244.0%
      Yuba City, CA66,6604412.0%
      Oshkosh, WI66,7533628.0%
      Kenner, LA66,7594510.0%
      Portland, ME66,7064020.0%
      Source: The Rosemont, Portland, ME 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.