TODAY JUN23
TEMPERATURE45
HUMIDITY93
PRESSURE30.12
WIND COND.170 4.7
  • 6145Sun20%40%
  • 6345Mon20%20%
  • 6044Tue
  • 6446Wed
  • 6446Thu
daynightWeather update from St. Mary's, St. Mary's Airport at

St. Mary's 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-27°F41°F4°F0.0"
February-26°F41°F10°F0.0"
March-18°F39°F9°F0.0"
April-11°F52°F21°F0.1"
May14°F70°F39°F0.3"
June23°F75°F50°F0.6"
July36°F82°F54°F0.3"
August30°F73°F51°F0.5"
September25°F70°F45°F0.7"
October7°F54°F30°F0.4"
November-17°F43°F14°F0.0"
December-26°F46°F12°F0.0"

Did you know?

  • The highest monthly average temperature in St. Mary's for July is 54 degrees.
  • The lowest monthly average temperature in St. Mary's for January is 4 degrees.
  • The most monthly precipitation in St. Mary's occurs in September with 0.7 inches.
  • The air quality index in St. Mary's is 41% better than the national average.
  • The pollution index in St. Mary's is 93% better than the national average.

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Compare St. Mary's, AK Weather To Other Cities

St. Mary's 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.
IndexSt. Mary'sAlaskaNational
Air quality index293050
Pollution index349,53311,990,2865,066,862

St. Mary's air quality information

MeasurementTotal
Days measured365
Days with good air quality284
Days with moderate air quality76
Days w/ poor A.Q. for sensitive groups4
Days with unhealthy air quality1

St. Mary's air quality information

PollutantTotal
Arsenic0.000%
Benzene0.010%
Carbon Tetrachloride0.000%
Lead0.000%
Mercury0.000%

Average monthly St. Mary's temperature with heat index

St. Mary's monthly precipitation with daily maximum

St. Mary's monthly snow depth with daily maximum

St. Mary's monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Pilot Station, AK6002942%
Pitkas Point, AK1282942%
St. Mary's, AK5212942%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Egan, LA5214412%
Scammon Bay, AK5212942%
Cross Roads, PA5214510%
Williamsfield, IL521484%
Montreat, NC5214020%
St. Mary's, AK5212942%
Source: The St. Mary's, AK 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.