Zip 18109 (Allentown, PA) Climate


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The climate in Allentown, PA 18109 is typically characterized by warm and humid summers and cold and snowy winters. Average temperatures range from the mid-80s Fahrenheit in the summer to the low 20s Fahrenheit in the winter. Rainfall is fairly common throughout the year, with an average of 40 inches per year. Allentown experiences all four seasons, usually with a mild spring and fall season.

Allentown (zip 18109), Pennsylvania gets 47 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Allentown (zip 18109) averages 29 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 204 sunny days per year in Allentown (zip 18109). The US average is 205 sunny days.

Allentown (zip 18109) gets some kind of precipitation, on average, 122 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 85 degrees
Winter Low: the January low is 18
Rain: averages 47 inches of rain a year
Snow: averages 29 inches of snow a year


Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 18109 zip code is 7.0 (10=best), which means it is more comfortable than most places in Pennsylvania.

8.7 Summer - 5.1 Winter
June, September and August are the most pleasant months in the 18109 zip code, while January and February are the least comfortable months.

  ClimateAllentown, PennsylvaniaUnited States
  47.4 in.38.1 in.
  29.3 in.27.8 in.
  122.0 days106.2 days
  204 days205 days
  85.4°85.8°
  18.3°21.7°
  77
  3.84.3
  348 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 18109 zip code with an average high temperature of 85.4°, which ranks it as warmer than most places in Pennsylvania. In the 18109 zip code, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the 18109 zip code are September, June and May.
In the 18109 zip code, there are 17.8 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 the 18109 zip code with an average of 18.3°. This is colder than most places in Pennsylvania.
In the 18109 zip code, there are 133.3 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Pennsylvania.
In the 18109 zip code, there are 2.1 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Pennsylvania.
The humidity is usually comfortable in the 18109 zip code 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.
July is the wettest month in the 18109 zip code with 5.0 inches of rain, and the driest month is February with 2.8 inches. The wettest season is Autumn with 28% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 47.4 inches in the 18109 zip code means that it is wetter than most places in Pennsylvania.
May is the rainiest month in the 18109 zip code with 11.9 days of rain, and September is the driest month with only 8.9 rainy days. There are 122.0 rainy days annually in the 18109 zip code, which is less rainy than most places in Pennsylvania. The rainiest season is Summer when it rains 27% of the time and the driest is Winter with only a 23% chance of a rainy day.
An annual snowfall of 29.3 inches in the 18109 zip code means that it is about average compared to other places in Pennsylvania. February is the snowiest month in the 18109 zip code with 10.1 inches of snow, and 6 months of the year have significant snowfall.
Reviews for Allentown
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Over 6 years ago

The city of Allentown is a rising city much thanks to our former mayor despite his indiscretions he actually brought this city back I have been living here over 50 years  More

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