Mercer, PA Climate


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United States / Pennsylvania / Youngstown-Warren-Boardman Metro Area / Mercer County / Mercer / Zip Codes
Mercer borough, PA has a humid continental climate with hot and humid summers and cold winters. The average temperature in summer is around 76°F with the highest temperatures reaching into the 90s. Winters can get fairly cold with temperatures dropping to around 20°F with occasional snowfall throughout the season. Precipitation is evenly spread out throughout the year with a slightly higher amount during the winter months compared to summer.

Mercer, Pennsylvania gets 42 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Mercer averages 45 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 158 sunny days per year in Mercer. The US average is 205 sunny days.

Mercer gets some kind of precipitation, on average, 156 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 82 degrees
Winter Low: the January low is 17
Rain: averages 42 inches of rain a year
Snow: averages 45 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Mercer borough is 6.7 (10=best), which means it is less comfortable than most places in Pennsylvania.

9 Summer - 4.4 Winter
August, July and June are the most pleasant months in Mercer borough, while January and December are the least comfortable months.

  ClimateMercer, PennsylvaniaUnited States
  42.3 in.38.1 in.
  44.5 in.27.8 in.
  155.7 days106.2 days
  158 days205 days
  82.2°85.8°
  16.5°21.7°
  6.77
  3.34.3
  1263 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 Mercer borough with an average high temperature of 82.2°, which ranks it as cooler than most places in Pennsylvania. In Mercer borough, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Mercer borough are June, August and September.
In Mercer borough, there are 6.5 days annually when the high temperature is over 90°, which is cooler than most places in Pennsylvania.
January has the coldest nighttime temperatures for Mercer borough with an average of 16.5°. This is colder than most places in Pennsylvania.
In Mercer borough, there are 143.6 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Pennsylvania.
In Mercer borough, there are 7.1 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Pennsylvania.
Humidity in Mercer borough is generally low and comfortable. But there some days when the humidity becomes unpleasant, especially in July and August. The most humid months (but still comfortable) are July, August and June.
June is the wettest month in Mercer borough with 4.5 inches of rain, and the driest month is February with 2.2 inches. The wettest season is Autumn with 30% of yearly precipitation and 19% occurs in Spring, which is the driest season. The annual rainfall of 42.3 inches in Mercer borough means that it is about average compared to other places in Pennsylvania.
January is the rainiest month in Mercer borough with 15.3 days of rain, and August is the driest month with only 10.3 rainy days. There are 155.7 rainy days annually in Mercer borough, which is rainier than most 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 44.5 inches in Mercer borough means that it is snowier than most places in Pennsylvania. January is the snowiest month in Mercer borough with 12.6 inches of snow, and 6 months of the year have significant snowfall.
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