Zip 18109 (Allentown, PA) Weather


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The most pleasant months of the year for the 18109 zip code are September, June and May. In the 18109 zip code, there are 4 comfortable months with high temperatures in the range of 70-85°. 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. 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. July is the most humid month, though humidity is low for most of the year.

Today's Weather - Allentown, PA

11 PM PST

Light Rain Likely

39°F

7 DAY FORECASTDESCRIPTIONHIGH/LOWWIND
OvernightLight Rain Likely38° / 51°E 0 to 5 mph
Friday NightMostly Cloudy29° / 36°NW 5 to 10 mph
Saturday NightMostly Clear17° / 42°NW 5 to 10 mph
Sunday NightMostly Cloudy31° / 53°SW 5 to 10 mph
Monday NightMostly Cloudy36° / 61°SE 5 mph
Tuesday NightLight Rain Likely50° / 64°S 15 to 20 mph
Wednesday NightChance Rain Showers42° / 53°SW 20 to 25 mph

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 Allentown (zip 18109) area is 8.7 (10=best), which means it is more comfortable than most places in Pennsylvania.

8.7 / 10

A higher score indicates a more comfortable year-round climate. The US average for the comfort index is 7.8. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.


Average Monthly High and Low (°F)
HighLow
January38° 18°
February41° 20°
March50° 27°
April62° 37°
May73° 47°
June81° 57°
July85° 62°
August84° 60°
September76° 52°
October65° 40°
November54° 32°
December42° 23°
Hot, Freezing, Rainy, Snowy Days: Allentown
Hot
Days
Freezing
Days
Rainy
Days
Snowy
Days
January029105
February02694
March022102
April07110
May11120
June40110
July70110
August50100
September1090
October0690
November016100
December027103

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.

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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