Norristown, PA Climate


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United States / Pennsylvania / Philadelphia-Camden-Wilmington Metro Area / Montgomery County / Norristown / Zip Codes
Norristown, PA is located in the Mid-Atlantic region of the US and has a humid continental climate. This type of climate features warm and humid summers with frequent thunderstorms, and cold winters with occasional snowfall. The average temperature in Norristown is around 45°F in January and 73°F in July. On average, over 44 inches of precipitation falls per year, making Norristown a moderately wet city.

Norristown, Pennsylvania gets 47 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Norristown averages 17 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 209 sunny days per year in Norristown. The US average is 205 sunny days.

Norristown gets some kind of precipitation, on average, 114 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 87 degrees
Winter Low: the January low is 21
Rain: averages 47 inches of rain a year
Snow: averages 17 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Norristown is 7.2 (10=best), which means it is one of the most pleasant places in Pennsylvania.

8.5 Summer - 5.5 Winter
September, June and May are the most pleasant months in Norristown, while January and February are the least comfortable months.

  ClimateNorristown, PennsylvaniaUnited States
  46.9 in.38.1 in.
  16.7 in.27.8 in.
  113.6 days106.2 days
  209 days205 days
  87.2°85.8°
  21.2°21.7°
  7.27
  4.14.3
  154 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 Norristown with an average high temperature of 87.2°, which ranks it as one of the hottest places in Pennsylvania. In Norristown, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Norristown are September, May and June.
In Norristown, there are 25.2 days annually when the high temperature is over 90°, which is one of the hottest places in Pennsylvania.
January has the coldest nighttime temperatures for Norristown with an average of 21.2°. This is warmer than most places in Pennsylvania.
In Norristown, there are 115.6 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Pennsylvania.
In Norristown, there are 1.2 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Pennsylvania.
The humidity is usually comfortable in Norristown but some summer months can be sticky or muggy. July is the most humid month, though humidity is low for most of the year. The most humid months are July, August and June.
September is the wettest month in Norristown with 4.6 inches of rain, and the driest month is February with 2.9 inches. The wettest season is Autumn with 26% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 46.9 inches in Norristown means that it is wetter than most places in Pennsylvania.
April is the rainiest month in Norristown with 11.5 days of rain, and September is the driest month with only 8.0 rainy days. There are 113.6 rainy days annually in Norristown, which is one of the least rainy places in Pennsylvania. The rainiest season is Summer when it rains 29% of the time and the driest is Winter with only a 22% chance of a rainy day.
An annual snowfall of 16.7 inches in Norristown means that it is one of the least snowy places in Pennsylvania. February is the snowiest month in Norristown with 7.4 inches of snow, and 4 months of the year have significant snowfall.
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Fred · Voorhees, NJ
Intended relocation
Over 15 years ago

No review yet, rather a preview: We are looking to relocate from Hong Kong to Philadelphia or its environs and, via Internet sources, we get the impression that  More

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Paul Greco · Norristown, PA
"Hollywood is coming to Norristown"
Over 16 years ago

Keep an eye out here for news of the(10 sound stage) Movie Studio coming to Norristown. Norristown Real Estate values are on the rise(Zillow.com)and may go even higher,  More

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