2025 Compare Climate & Weather:
Rockville, MD vs Zimmerman, MN

Highlights

On average, there are 199 sunny days per year in Zimmerman. Rockville averages 203 sunny days per year. The US average is 205 sunny days.

Zimmerman, Minnesota gets 32 inches of rain, on average, per year. Rockville, Maryland gets 42.2 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Zimmerman averages 47.7 inches of snow per year. Rockville averages 18.2 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Zimmerman, Minnesota
Summer High: the July high is around 82.6 degrees
Winter Low: the January low is 3.7
Rain: averages 32 inches of rain a year
Snow: averages 47.7 inches of snow a year

Rockville, Maryland
Summer High: the July high is around 84.8 degrees
Winter Low: the January low is 25.1
Rain: averages 42.2 inches of rain a year
Snow: averages 18.2 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Zimmerman is 6.6 (10=best), which means it is more comfortable than most places in Minnesota.

The annual BestPlaces Comfort Index for Rockville is 7.4 (10=best), which means it is one of the most pleasant places in Maryland.

Today's Weather - Rockville, MD

76°F

Today's Weather - Zimmerman, MN

46°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Rockville / Zimmerman

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.

July is the hottest month for Zimmerman with an average high temperature of 82.6°, which ranks it as warmer than most places in Minnesota. In Zimmerman, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Zimmerman are June, August and July.

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

January has the coldest nighttime temperatures for Zimmerman with an average of 3.7°. This is about average compared to other places in Minnesota.

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 Zimmerman, there are 7.4 days annually when the high temperature is over 90°, which is about average compared to other places in Minnesota.

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 Zimmerman, there are 160.6 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Minnesota.

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

In Zimmerman, there are 29.9 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Minnesota.

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.


June is the wettest month in Zimmerman with 4.5 inches of rain, and the driest month is January with 0.8 inches. The wettest season is Autumn with 40% of yearly precipitation and 8% occurs in Spring, which is the driest season. The annual rainfall of 32.0 inches in Zimmerman means that it is wetter than most places in Minnesota.

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.

June is the rainiest month in Zimmerman with 10.3 days of rain, and February is the driest month with only 5.0 rainy days. There are 93.8 rainy days annually in Zimmerman, which is less rainy than most places in Minnesota. The rainiest season is Autumn when it rains 31% of the time and the driest is Spring with only a 18% chance of a rainy day.

An annual snowfall of 18.2 inches in Rockville means that it is snowier than most places in Maryland.

An annual snowfall of 47.7 inches in Zimmerman means that it is snowier than most places in Minnesota.

January is the snowiest month in Rockville with 7.1 inches of snow, and 5 months of the year have significant snowfall.

January is the snowiest month in Zimmerman with 9.9 inches of snow, and 6 months of the year have significant snowfall.