2025 Compare Climate & Weather:
New Haven, CT vs Rockville, MD

Highlights

On average, there are 203 sunny days per year in Rockville. New Haven averages 204 sunny days per year. The US average is 205 sunny days.

Rockville, Maryland gets 42.2 inches of rain, on average, per year. New Haven, Connecticut gets 48.1 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Rockville averages 18.2 inches of snow per year. New Haven averages 29.1 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

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

New Haven, Connecticut
Summer High: the July high is around 83.4 degrees
Winter Low: the January low is 20.5
Rain: averages 48.1 inches of rain a year
Snow: averages 29.1 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.

The annual BestPlaces Comfort Index for New Haven is 7.2 (10=best), which means it is one of the most pleasant places in Connecticut.

Today's Weather - New Haven, CT

65°F

Today's Weather - Rockville, MD

66°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: New Haven / Rockville

July is the hottest month for New Haven with an average high temperature of 83.4°, which ranks it as warmer than most places in Connecticut. In New Haven, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for New Haven are June, September and August.

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 New Haven with an average of 20.5°. This is warmer than most places in Connecticut.

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 New Haven, there are 7.6 days annually when the high temperature is over 90°, which is about average compared to other places in Connecticut.

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 New Haven, there are 112.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Connecticut.

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 New Haven, there are 1.1 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Connecticut.

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

April is the wettest month in New Haven with 4.5 inches of rain, and the driest month is February with 3.1 inches. The wettest season is Summer with 27% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 48.1 inches in New Haven means that it is drier than most places in Connecticut.


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 New Haven with 10.7 days of rain, and August is the driest month with only 7.8 rainy days. There are 107.7 rainy days annually in New Haven, which is one of the least rainy places in Connecticut. 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.

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 29.1 inches in New Haven means that it is less snowy than most places in Connecticut.

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 New Haven with 8.4 inches of snow, and 6 months of the year have significant snowfall.

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