Rockville, Maryland gets 42 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Rockville averages 18 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 203 sunny days per year in Rockville. The US average is 205 sunny days.
Rockville gets some kind of precipitation, on average, 112 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 85 degrees
Winter Low: the January low is 25
Rain: averages 42 inches of rain a year
Snow: averages 18 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Rockville is 7.4 (10=best), which means it is one of the most pleasant places in Maryland.
7.4 / 10
September, June and May are the most pleasant months in Rockville, while January and February are the least comfortable months.