Climate in Suffolk County, NY

The climate in Suffolk County, NY is a typical New England mix of warm summers and cold winters. During the summer months, temperatures usually range from the mid-60s to low 80s with high humidity and occasional showers. Winters can be quite cold and wet, with temperatures in the low 30s and occasional snowstorms. The area enjoys four distinct seasons with mild springs and colorful autumns. Rainfall averages 72 inches per year throughout the county, while average monthly temperature highs are above 50 degrees for all but two months out of the year—December and January.

Suffolk County, New York gets 47 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Suffolk County averages 27 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 206 sunny days per year in Suffolk County. The US average is 205 sunny days.

Suffolk 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.

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Weather Highlights

Summer High: the July high is around 82 degrees
Winter Low: the January low is 23
Rain: averages 47 inches of rain a year
Snow: averages 27 inches of snow a year

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BESTPLACES COMFORT INDEX

The annual BestPlaces Comfort Index for Suffolk County is 7.2 (10=best), which means it is more comfortable than most places in New York.

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

July is the hottest month for Suffolk County with an average high temperature of 82.1°, which ranks it as warmer than most places in New York. In Suffolk County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Suffolk County are June, August and September.

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In Suffolk County, there are 5.6 days annually when the high temperature is over 90°, which is about average compared to other places in New York.

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January has the coldest nighttime temperatures for Suffolk County with an average of 23.2°. This is warmer than most places in New York.

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In Suffolk County, there are 99.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in New York.

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In Suffolk County, there are 0.3 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in New York.

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The humidity is usually comfortable in Suffolk 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.

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April is the wettest month in Suffolk County with 4.5 inches of rain, and the driest month is February with 3.2 inches. The wettest season is Summer with 27% of yearly precipitation and 23% occurs in Spring, which is the driest season. The annual rainfall of 47.2 inches in Suffolk County means that it is wetter than most places in New York.

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April is the rainiest month in Suffolk County with 10.8 days of rain, and August is the driest month with only 8.0 rainy days. There are 112.6 rainy days annually in Suffolk County, which is one of the least rainy places in New York. 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.

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An annual snowfall of 27.2 inches in Suffolk County means that it is less snowy than most places in New York. February is the snowiest month in Suffolk County with 8.2 inches of snow, and 6 months of the year have significant snowfall.

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