In 18920 Erwinna, Pennsylvania, the climate is generally mild and temperate. It experiences all four seasons throughout the year with hot summers, cool springs, cold winters and warm autumns. Average high temperatures range between 40 to 82 degrees Fahrenheit throughout the year with lows ranging from 20 to 65 degrees Fahrenheit. Rainfall is moderate but tends to increase in the spring and summer months. Snowfall is also moderate with accumulations ranging from 10 to 24 inches throughout the winter months. The area enjoys a wide variety of climates due to its location near both Philadelphia and Allentown which experience different climatic trends.
Erwinna (zip 18920), Pennsylvania gets 50 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Erwinna (zip 18920) averages 25 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 Erwinna (zip 18920). The US average is 205 sunny days.
Erwinna (zip 18920) gets some kind of precipitation, on average, 117 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 19
Rain: averages 50 inches of rain a year
Snow: averages 25 inches of snow a year