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