Currently: 47 °F. Light rain. Fog. (Weather station: Cape Romanzoff Airways Facilities Sector, USA). See more current weatherAnnual Weather Averages in Hooper Bay Weather Reporting System
Hooper Bay Weather Reporting System is 104 miles from St. Mary's, so the actual climate in St. Mary's can vary a bit.
Based on weather reports collected during 2012–2021.
All Year Climate & Weather Averages in St. Mary's
High Temp: 57 °F
Low Temp: 8 °F
Mean Temp: 32 °F
Precipitation: 0.69"
Humidity: 82%
Dew Point: 27 °F
Wind: 28 mph
Pressure: 29.82 "Hg
Visibility: 8 mi
January Climate & Weather Averages in St. Mary's
High Temp: 20 °F
Low Temp: 8 °F
Mean Temp: 14 °F
Precipitation: 0.28"
Humidity: 82%
Dew Point: 9 °F
Wind: 34 mph
Pressure: 29.70 "Hg
Visibility: 7 mi
February Climate & Weather Averages in St. Mary's
High Temp: 21 °F
Low Temp: 9 °F
Mean Temp: 15 °F
Precipitation: 0.48"
Humidity: 82%
Dew Point: 10 °F
Wind: 35 mph
Pressure: 29.78 "Hg
Visibility: 7 mi
March Climate & Weather Averages in St. Mary's
High Temp: 22 °F
Low Temp: 9 °F
Mean Temp: 16 °F
Precipitation: 0.21"
Humidity: 82%
Dew Point: 11 °F
Wind: 29 mph
Pressure: 29.92 "Hg
Visibility: 7 mi
April Climate & Weather Averages in St. Mary's
High Temp: 33 °F
Low Temp: 21 °F
Mean Temp: 27 °F
Precipitation: 0.36"
Humidity: 82%
Dew Point: 22 °F
Wind: 26 mph
Pressure: 29.85 "Hg
Visibility: 8 mi
May Climate & Weather Averages in St. Mary's
High Temp: 43 °F
Low Temp: 33 °F
Mean Temp: 38 °F
Precipitation: 0.40"
Humidity: 83%
Dew Point: 33 °F
Wind: 24 mph
Pressure: 29.91 "Hg
Visibility: 9 mi
June Climate & Weather Averages in St. Mary's
High Temp: 52 °F
Low Temp: 43 °F
Mean Temp: 48 °F
Precipitation: 0.58"
Humidity: 85%
Dew Point: 43 °F
Wind: 23 mph
Pressure: 29.93 "Hg
Visibility: 9 mi
July Climate & Weather Averages in St. Mary's
High Temp: 56 °F
Low Temp: 49 °F
Mean Temp: 53 °F
Precipitation: 0.79"
Humidity: 79%
Dew Point: 44 °F
Wind: 23 mph
Pressure: 29.97 "Hg
Visibility: 9 mi
August Climate & Weather Averages in St. Mary's
High Temp: 57 °F
Low Temp: 49 °F
Mean Temp: 53 °F
Precipitation: 1.44"
Humidity: 82%
Dew Point: 46 °F
Wind: 24 mph
Pressure: 29.88 "Hg
Visibility: 9 mi
September Climate & Weather Averages in St. Mary's
High Temp: 50 °F
Low Temp: 42 °F
Mean Temp: 46 °F
Precipitation: 1.70"
Humidity: 79%
Dew Point: 39 °F
Wind: 26 mph
Pressure: 29.78 "Hg
Visibility: 9 mi
October Climate & Weather Averages in St. Mary's
High Temp: 42 °F
Low Temp: 34 °F
Mean Temp: 38 °F
Precipitation: 1.15"
Humidity: 83%
Dew Point: 33 °F
Wind: 28 mph
Pressure: 29.70 "Hg
Visibility: 9 mi
November Climate & Weather Averages in St. Mary's
High Temp: 29 °F
Low Temp: 20 °F
Mean Temp: 25 °F
Precipitation: 0.52"
Humidity: 83%
Dew Point: 20 °F
Wind: 29 mph
Pressure: 29.75 "Hg
Visibility: 8 mi
December Climate & Weather Averages in St. Mary's
High Temp: 23 °F
Low Temp: 12 °F
Mean Temp: 17 °F
Precipitation: 0.41"
Humidity: 84%
Dew Point: 13 °F
Wind: 33 mph
Pressure: 29.63 "Hg
Visibility: 8 mi