Potomac, Maryland gets 42 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Potomac averages 17 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 201 sunny days per year in Potomac. The US average is 205 sunny days.
Potomac 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 86 degrees
Winter Low: the January low is 25
Rain: averages 42 inches of rain a year
Snow: averages 17 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Potomac is 7.3 (10=best), which means it is more comfortable than most places in Maryland.
7.3 / 10
September, June and May are the most pleasant months in Potomac, while January and February are the least comfortable months.