Climate in Rockville, Maryland

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.

Weather Highlights

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.

July is the hottest month for Rockville with an average high temperature of 84.8°, which ranks it as one of the coolest places in Maryland. In Rockville, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Rockville are September, June and May.

January has the coldest nighttime temperatures for Rockville with an average of 25.1°. This is about average compared to other places in Maryland.

In Rockville, there are 13.9 days annually when the high temperature is over 90°, which is one of the coolest places in Maryland.

In Rockville, there are 88.3 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Maryland.

In Rockville, there are 0.1 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Maryland.

May is the wettest month in Rockville with 4.3 inches of rain, and the driest month is February with 2.7 inches. The wettest season is Summer with 27% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 42.2 inches in Rockville means that it is drier than most places in Maryland.

May is the rainiest month in Rockville with 11.6 days of rain, and August is the driest month with only 8.2 rainy days. There are 112.3 rainy days annually in Rockville, which is about average compared to other places in Maryland. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 23% chance of a rainy day.

An annual snowfall of 18.2 inches in Rockville means that it is snowier than most places in Maryland. January is the snowiest month in Rockville with 7.1 inches of snow, and 5 months of the year have significant snowfall.

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