In 1940, Norristown, Pennsylvania was known for its humid summers and cold winters. Temperatures during the summer months usually ranged from 70-85 degrees Fahrenheit, while temperatures in the winter months typically dipped to 20-30 degrees Fahrenheit. Rainfall was abundant throughout the year, with an average of 4 inches of rain per month. The area experienced moderate snowfall in the winter months, with an annual average of about 12 inches. Overall, Norristown had a temperate climate which provided many pleasant days for outdoor activities.
Norristown (zip 19401), Pennsylvania gets 47 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Norristown (zip 19401) averages 17 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 205 sunny days per year in Norristown (zip 19401). The US average is 205 sunny days.
Norristown (zip 19401) 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