New Haven County, CT Climate

New Haven, CT County has a humid continental climate characterized by warm summers and cold winters. The average high temperature in the summer months is around 80ºF with an average of 10 days per summer season with temperatures over 90ºF. In the winter months, temperatures can drop down to lows of 15°F or colder with heavy snowfall at times. Precipitation is frequent throughout the year, averaging over 48 inches annually. The area also experiences strong winds often due to its close proximity to Long Island Sound and the Atlantic Ocean.

New Haven County, Connecticut gets 50 inches of rain, on average, per year. The US average is 38 inches of rain per year.

New Haven County averages 34 inches of snow per year. The US average is 28 inches of snow per year.

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

New Haven County gets some kind of precipitation, on average, 113 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 84 degrees
Winter Low: the January low is 19
Rain: averages 50 inches of rain a year
Snow: averages 34 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for New Haven County is 7.1 (10=best), which means it is more comfortable than most places in Connecticut.

9 Summer - 5.1 Winter

June, September and August are the most pleasant months in New Haven County, while January and February are the least comfortable months.

Climate	New Haven, Connecticut	United States
	49.8 in.	38.1 in.
	34.1 in.	27.8 in.
	113.1 days	106.2 days
	204 days	205 days
	83.6°	85.8°
	18.8°	21.7°
	7.1	7
	3.5	4.3
	309 ft.	2443 ft.

Climate

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

July is the hottest month for New Haven County with an average high temperature of 83.6°, which ranks it as warmer than most places in Connecticut. In New Haven County, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for New Haven County are June, September and August.

In New Haven County, there are 8.8 days annually when the high temperature is over 90°, which is hotter than most places in Connecticut.

January has the coldest nighttime temperatures for New Haven County with an average of 18.8°. This is about average compared to other places in Connecticut.

In New Haven County, there are 122.4 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Connecticut.

In New Haven County, there are 2.6 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Connecticut.

The humidity is usually comfortable in New Haven County but some summer months can be sticky or muggy. July is the most humid month, though humidity is low for most of the year. The most humid months are July, August and June.

October is the wettest month in New Haven County with 4.7 inches of rain, and the driest month is February with 3.3 inches. The wettest season is Summer with 26% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 49.8 inches in New Haven County means that it is about average compared to other places in Connecticut.

May is the rainiest month in New Haven County with 11.1 days of rain, and October is the driest month with only 8.3 rainy days. There are 113.1 rainy days annually in New Haven County, which is less rainy than most 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.

An annual snowfall of 34.1 inches in New Haven County means that it is about average compared to other places in Connecticut. January is the snowiest month in New Haven County with 10.1 inches of snow, and 6 months of the year have significant snowfall.

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