Union County, NJ Climate

Union, NJ County has a humid subtropical climate with hot and humid summers and cool winters. Average highs in the summer are in the mid 80s (F) while winter temperatures can dip into the 40s (F). Precipitation throughout the year is plentiful, averaging over 47 inches of rain annually. Snowfall is moderate, usually ranging from 8-12 inches per year. During extreme heat waves, temperatures can reach as high as 100 degrees Fahrenheit during the summer months in Union County.

Union County, New Jersey gets 49 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Union County averages 25 inches of snow per year. The US average is 28 inches of snow per year.

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

Union County gets some kind of precipitation, on average, 117 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 86 degrees
Winter Low: the January low is 22
Rain: averages 49 inches of rain a year
Snow: averages 25 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Union County is 7.2 (10=best), which means it is about average compared to other places in New Jersey.

8.6 Summer - 5.5 Winter

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

Climate	Union, New Jersey	United States
	Unlock	38.1 in.
	24.5 in.	Unlock
	Unlock	106.2 days
	205 days	Unlock
	86.2°	85.8°
	Unlock	21.7°
	7.2	Unlock
	Unlock	4.3
	128 ft.	Unlock

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 Union County with an average high temperature of 86.2°, which ranks it as warmer than most places in New Jersey. In Union County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Union County are September, June and May.

In Union County, there are 21.2 days annually when the high temperature is over 90°, which is hotter than most places in New Jersey.

January has the coldest nighttime temperatures for Union County with an average of 21.9°. This is colder than most places in New Jersey.

In Union County, there are 106.6 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in New Jersey.

In Union County, there are 0.8 days annually when the nighttime low temperature falls below zero°, which is colder than most places in New Jersey.

The humidity is usually comfortable in Union 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.

July is the wettest month in Union County with 5.1 inches of rain, and the driest month is February with 2.9 inches. The wettest season is Autumn with 27% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 48.9 inches in Union County means that it is wetter than most places in New Jersey.

May is the rainiest month in Union County with 11.4 days of rain, and February is the driest month with only 8.5 rainy days. There are 117.4 rainy days annually in Union County, which is about average compared to other places in New Jersey. 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 24.5 inches in Union County means that it is about average compared to other places in New Jersey. February is the snowiest month in Union County with 8.1 inches of snow, and 5 months of the year have significant snowfall.

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