Zip 20170 (Herndon, VA) Climate

In 2017, Herndon, VA experienced a mild climate with warm summers and cool winters. The average summer temperature was around 80 degrees Fahrenheit while the average winter temperature was typically around 40 degrees. During the spring months, temperatures averaged in the mid-50s and during fall they hovered around the mid-60s. Rainfall in Herndon was consistent throughout the year with an average of 4 inches per month. Snowfall in Herndon rarely occurred, usually only a few inches at most over the course of winter. Overall, 2017 provided pleasant weather for those living in Herndon, VA.

Herndon (zip 20170), Virginia gets 43 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Herndon (zip 20170) averages 22 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 197 sunny days per year in Herndon (zip 20170). The US average is 205 sunny days.

Herndon (zip 20170) gets some kind of precipitation, on average, 120 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 24
Rain: averages 43 inches of rain a year
Snow: averages 22 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 20170 zip code is 7.3 (10=best), which means it is about average compared to other places in Virginia.

8.3 Summer - 5.6 Winter

September, June and May are the most pleasant months in the 20170 zip code, while January and February are the least comfortable months.

Climate	Herndon, Virginia	United States
	Unlock	38.1 in.
	21.5 in.	Unlock
	Unlock	106.2 days
	197 days	Unlock
	85.8°	85.8°
	Unlock	21.7°
	7.3	Unlock
	Unlock	4.3
	351 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 the 20170 zip code with an average high temperature of 85.8°, which ranks it as cooler than most places in Virginia. In the 20170 zip code, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the 20170 zip code are September, June and May.

In the 20170 zip code, there are 18.9 days annually when the high temperature is over 90°, which is cooler than most places in Virginia.

January has the coldest nighttime temperatures for the 20170 zip code with an average of 23.5°. This is colder than most places in Virginia.

In the 20170 zip code, there are 103.9 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Virginia.

In the 20170 zip code, there are 0.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Virginia.

The humidity is usually acceptable in the 20170 zip code but some summer months can be sticky or muggy. July is the most humid month, though humidity is low for most of the year. July, August and June are the three most uncomfortably humid months in the 20170 zip code.

May is the wettest month in the 20170 zip code with 4.6 inches of rain, and the driest month is February with 2.8 inches. The wettest season is Summer with 28% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 42.9 inches in the 20170 zip code means that it is drier than most places in Virginia.

May is the rainiest month in the 20170 zip code with 12.2 days of rain, and October is the driest month with only 8.1 rainy days. There are 119.5 rainy days annually in the 20170 zip code, which is rainier than most places in Virginia. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 22% chance of a rainy day.

An annual snowfall of 21.5 inches in the 20170 zip code means that it is one of the snowiest places in Virginia. February is the snowiest month in the 20170 zip code with 7.8 inches of snow, and 5 months of the year have significant snowfall.

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mark · Herndon, VA

Herndon Suburb

Over 16 years ago

I live 'just' outside the town of Herndon on the dividing line between Loudon and the more expensive Fairfax Counties. It's rather a nice place to live and all yet too More

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