Norristown, Pennsylvania gets 47 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Norristown averages 17 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 209 sunny days per year in Norristown. The US average is 205 sunny days.
Norristown 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.
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
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Norristown is 7.2 (10=best), which means it is one of the most pleasant places in Pennsylvania.
7.2 / 10
September, June and May are the most pleasant months in Norristown, while January and February are the least comfortable months.