2025 Compare Climate & Weather:
Cary, NC vs Herndon, VA

Highlights

On average, there are 201 sunny days per year in Herndon. Cary averages 213 sunny days per year. The US average is 205 sunny days.

Herndon, Virginia gets 42.9 inches of rain, on average, per year. Cary, North Carolina gets 46.3 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Herndon averages 21.5 inches of snow per year. Cary averages 4.1 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Herndon, Virginia
Summer High: the July high is around 85.8 degrees
Winter Low: the January low is 23.5
Rain: averages 42.9 inches of rain a year
Snow: averages 21.5 inches of snow a year

Cary, North Carolina
Summer High: the July high is around 89.1 degrees
Winter Low: the January low is 29.9
Rain: averages 46.3 inches of rain a year
Snow: averages 4.1 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Cary is 7.5 (10=best), which means it is more comfortable than most places in North Carolina.

Today's Weather - Cary, NC

55°F

Today's Weather - Herndon, VA

48°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Cary / Herndon

July is the hottest month for Cary with an average high temperature of 89.1°, which ranks it as about average compared to other places in North Carolina. In Cary, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Cary are May, September and October.

July is the hottest month for Herndon with an average high temperature of 85.8°, which ranks it as cooler than most places in Virginia. In Herndon, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Herndon are September, June and May.

January has the coldest nighttime temperatures for Cary with an average of 29.9°. This is about average compared to other places in North Carolina.

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

In Cary, there are 37.0 days annually when the high temperature is over 90°, which is about average compared to other places in North Carolina.

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

In Cary, there are 65.6 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in North Carolina.

In Herndon, 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 Cary, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in North Carolina.

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

August is the wettest month in Cary with 4.7 inches of rain, and the driest month is April with 3.1 inches. The wettest season is Autumn with 30% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 46.3 inches in Cary means that it is drier than most places in North Carolina.


May is the wettest month in Herndon 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 Herndon means that it is drier than most places in Virginia.

July is the rainiest month in Cary with 10.8 days of rain, and October is the driest month with only 6.9 rainy days. There are 107.1 rainy days annually in Cary, which is less rainy than most places in North Carolina. The rainiest season is Autumn when it rains 28% of the time and the driest is Winter with only a 21% chance of a rainy day.

May is the rainiest month in Herndon 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 Herndon, 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 4.1 inches in Cary means that it is snowier than most places in North Carolina.

An annual snowfall of 21.5 inches in Herndon means that it is one of the snowiest places in Virginia.

January is the snowiest month in Cary with 2.2 inches of snow, and 3 months of the year have significant snowfall.

February is the snowiest month in Herndon with 7.8 inches of snow, and 5 months of the year have significant snowfall.