Jefferson, NJ Climate


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United States / New Jersey / New York-Newark-Jersey City Metro Area / Morris County / Jefferson / Zip Codes
Jefferson, NJ has a humid continental climate. Summers are generally warm and humid, with average high temperatures in the mid 80s during July and August. Winters are cold and snowy, with low temperatures typically falling into the teens and single digits during January and February. Average annual precipitation for Jefferson is around 42 inches, mostly occurring between April and October.

Jefferson, New Jersey gets 51 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Jefferson averages 34 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 Jefferson. The US average is 205 sunny days.

Jefferson gets some kind of precipitation, on average, 115 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 83 degrees
Winter Low: the January low is 17
Rain: averages 51 inches of rain a year
Snow: averages 34 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Jefferson is 7.1 (10=best), which means it is less comfortable than most places in New Jersey.

9.1 Summer - 5.1 Winter
August, July and June are the most pleasant months in Jefferson, while January and February are the least comfortable months.

  ClimateJefferson, New JerseyUnited States
  51.2 in.38.1 in.
  33.5 in.27.8 in.
  115.3 days106.2 days
  206 days205 days
  83.4°85.8°
  17.4°21.7°
  7.17
  3.84.3
  1121 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 Jefferson with an average high temperature of 83.4°, which ranks it as cooler than most places in New Jersey. In Jefferson, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Jefferson are June, September and August.
In Jefferson, there are 9.4 days annually when the high temperature is over 90°, which is one of the coolest places in New Jersey.
January has the coldest nighttime temperatures for Jefferson with an average of 17.4°. This is one of the coldest places in New Jersey.
In Jefferson, there are 129.6 days annually when the nighttime low temperature falls below freezing, which is colder than most places in New Jersey.
In Jefferson, there are 3.2 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in New Jersey.
Humidity in Jefferson is generally low and comfortable. But there some days when the humidity becomes unpleasant, especially in July and August. The most humid months (but still comfortable) are July, August and June.
September is the wettest month in Jefferson with 4.8 inches of rain, and the driest month is February with 3.1 inches. The wettest season is Winter with 26% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 51.2 inches in Jefferson means that it is one of the wettest places in New Jersey.
April is the rainiest month in Jefferson with 11.2 days of rain, and October is the driest month with only 8.1 rainy days. There are 115.3 rainy days annually in Jefferson, which is less rainy than most places in New Jersey. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 21% chance of a rainy day.
An annual snowfall of 33.5 inches in Jefferson means that it is one of the snowiest places in New Jersey. January is the snowiest month in Jefferson with 11.0 inches of snow, and 6 months of the year have significant snowfall.
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Nomad · Lake Hopatcong, NJ
Great place to live...
Over 16 years ago

Low taxes, GREAT schools, Wonderful recreation in and out of schools. Excellent teachers and staff. In and around Lake Hopatcong, fishing, boating and beaches  More

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Robert · Lake Hopatcong, NJ
Jefferson Township, NJ
Over 16 years ago

Great place to live in Morris County, NJ. Year round entertainment both indoors and outdoors. Great youth sports programs thru high school. Hunting, fishing etc. On  More

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