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South Portland 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"

Did you know?

  • The highest monthly average temperature in South Portland for July is 70 degrees.
  • The lowest monthly average temperature in South Portland for January is 25 degrees.
  • The most monthly precipitation in South Portland occurs in October with 6.9 inches.
  • The air quality index in South Portland is 23% better than the national average.
  • The pollution index in South Portland is 59% better than the national average.

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South Portland 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.
IndexSouth PortlandMaineNational
Air quality index383350
Pollution index2,043,7002,555,8535,066,862

South Portland air quality information

MeasurementTotal
Days measured365
Days with good air quality287
Days with moderate air quality74
Days w/ poor A.Q. for sensitive groups4
Days with unhealthy air quality

South Portland air quality information

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

Average monthly South Portland temperature with heat index

South Portland monthly precipitation with daily maximum

South Portland monthly snow depth with daily maximum

South Portland monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Biddeford, ME21,3413824%
Falmouth Foreside, ME1,6373824%
Littlejohn Island, ME953824%
Saco, ME19,0083824%
Yarmouth, ME5,7093824%
South Portland, ME25,3973824%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Cabot, AR25,407476%
West Memphis, AR25,4114412%
Clinton, MS25,4114216%
Lafayette, CA25,3814314%
Melrose Park, IL25,4226020%
South Portland, ME25,3973824%
Source: The South 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.