Climate in Herndon (zip 20170), Virginia

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Climate	Herndon, VA	United States
Rainfall (in.)	42.8	36.5
Snowfall (in.)	21.4	25
Precipitation Days	120	100
Sunny Days	197	205
Avg. July High	87	86.5
Avg. Jan. Low	21.2	20.5
Comfort Index (higher=better)	42	44
UV Index	4	4.3
Elevation ft.	351	1,443

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Herndon (zip 20170), VA, gets 43 inches of rain per year. The US average is 37. Snowfall is 21 inches. The average US city gets 25 inches of snow per year. The number of days with any measurable precipitation is 120.

On average, there are 197 sunny days per year in Herndon (zip 20170), VA. The July high is around 87 degrees. The January low is 21. Our comfort index, which is based on humidity during the hot months, is a 42 out of 100, where higher is more comfortable. The US average on the comfort index is 44.

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Herndon Climate SperlingViews

Herndon Suburb : 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... (read more)Have an opinion about Herndon? Leave a commentTo See All SperlingViews for Herndon Click Here