St. Mary s, AK Climate


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United States / Alaska / No Metro Area / Kusilvak Census Area County / St. Mary s / Zip Codes
St. Mary's, AK is known for its subarctic climate, with long cold winters and short cool summers. The highest temperature recorded in St. Mary's was a scorching 83°F (28°C) in July of 2015, while the lowest was -62°F (-52°C) in February 1962! Average annual snowfall is around 60 inches (152 cm), making it one of the snowiest towns in Alaska. Summers are short but mild with temperatures ranging from 40-60°F (4-16°C). Winters are long and cold, with temperatures rarely climbing above freezing and night time lows regularly dipping below -30°F (-34°C).

St. Mary's, Alaska gets 19 inches of rain, on average, per year. The US average is 38 inches of rain per year.

St. Mary's averages 62 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 145 sunny days per year in St. Mary's. The US average is 205 sunny days.

St. Mary's gets some kind of precipitation, on average, 146 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.

Weather Highlights

Summer High: the July high is around 63 degrees
Winter Low: the January low is 1
Rain: averages 19 inches of rain a year
Snow: averages 62 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for St. Mary's is 4.6 (10=best), which means it is less comfortable than most places in Alaska.

7.5 Summer - 2.1 Winter
July, June and August are the most pleasant months in St. Mary's, while January and December are the least comfortable months.

  ClimateSt. Mary's, AlaskaUnited States
  18.5 in.38.1 in.
  61.8 in.27.8 in.
  146.1 days106.2 days
  145 days205 days
  63.4°85.8°
  0.8°21.7°
  4.67
  1.44.3
  44 ft.2443 ft.
Climate
YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

July is the hottest month for St. Mary's with an average high temperature of 63.4°, which ranks it as about average compared to other places in Alaska. In St. Mary's, there are 0 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for St. Mary's are July, June and August.
In St. Mary's, there are 0.0 days annually when the high temperature is over 90°, which is about average compared to other places in Alaska.
January has the coldest nighttime temperatures for St. Mary's with an average of 0.8°. This is about average compared to other places in Alaska.
In St. Mary's, there are 214.3 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Alaska.
In St. Mary's, there are 59.1 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Alaska.
Humidity is low in St. Mary's, and some people might find the dryness to be uncomfortable. Days with noticeable humidity are rare throughout the year. A very dry climate can lead to cracked, itchy skin and dry eyes.
August is the wettest month in St. Mary's with 3.3 inches of rain, and the driest month is February with 0.7 inches. The wettest season is Autumn with 40% of yearly precipitation and 13% occurs in Summer, which is the driest season. The annual rainfall of 18.5 inches in St. Mary's means that it is about average compared to other places in Alaska.
August is the rainiest month in St. Mary's with 18.0 days of rain, and February is the driest month with only 7.7 rainy days. There are 146.1 rainy days annually in St. Mary's, which is rainier than most places in Alaska. The rainiest season is Autumn when it rains 32% of the time and the driest is Spring with only a 19% chance of a rainy day.
An annual snowfall of 61.8 inches in St. Mary's means that it is about average compared to other places in Alaska. November is the snowiest month in St. Mary's with 12.9 inches of snow, and 9 months of the year have significant snowfall.
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