St. Marys Metro Area, PA Climate


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United States / Pennsylvania / St. Marys Metro Area / Counties / Cities / Zip Codes
The St. Marys, PA Metro Area has a humid continental climate, with hot and humid summers and cold winters. The average annual temperature is 49°F (9°C), while the average summer temperature is 73°F (23°C) and the average winter temperature is 28°F (-2°C). Precipitation levels are fairly consistent year-round, ranging from just under 30 inches in the summer to just over 31 inches during the winter months. Snowfall varies greatly throughout the area, but can range from around 48 inches in some of the higher elevations to as low as 20 inches in some of the lower areas.

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the St. Marys metro area is 6.3 (10=best), which means it is one of the least comfortable places in Pennsylvania.

8.9 Summer - 3.8 Winter
July, August and June are the most pleasant months in the St. Marys metro area, while January and December are the least comfortable months.

  ClimateSt. Marys, PennsylvaniaUnited States
  44.8 in.38.1 in.
  60.2 in.27.8 in.
  162.1 days106.2 days
  163 days205 days
  79.2°85.8°
  14.1°21.7°
  6.37
  3.44.3
  1766 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 the St. Marys metro area with an average high temperature of 79.2°, which ranks it as one of the coolest places in Pennsylvania. In the St. Marys metro area, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the St. Marys metro area are August, July and June.
In the St. Marys metro area, there are 1.6 days annually when the high temperature is over 90°, which is one of the coolest places in Pennsylvania.
January has the coldest nighttime temperatures for the St. Marys metro area with an average of 14.1°. This is one of the coldest places in Pennsylvania.
In the St. Marys metro area, there are 160.6 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Pennsylvania.
In the St. Marys metro area, there are 10.1 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Pennsylvania.
Humidity in the St. Marys metro area is generally quite low and comfortable. There are few days during the summer when the humidity becomes unpleasant. The most humid months (but still comfortable) are July, August and June.
June is the wettest month in the St. Marys metro area with 4.8 inches of rain, and the driest month is February with 2.5 inches. The wettest season is Autumn with 30% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 44.8 inches in the St. Marys metro area means that it is wetter than most places in Pennsylvania.
December is the rainiest month in the St. Marys metro area with 16.3 days of rain, and August is the driest month with only 11.2 rainy days. There are 162.1 rainy days annually in the St. Marys metro area, which is one of the rainiest places in Pennsylvania. The rainiest season is Spring when it rains 28% of the time and the driest is Autumn with only a 22% chance of a rainy day.
An annual snowfall of 60.2 inches in the St. Marys metro area means that it is snowier than most places in Pennsylvania. January is the snowiest month in the St. Marys metro area with 17.0 inches of snow, and 6 months of the year have significant snowfall.
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