2025 Compare Climate & Weather:
Chantilly, VA vs Roanoke, VA

Highlights

On average, there are 211 sunny days per year in Roanoke. Chantilly averages 197 sunny days per year. The US average is 205 sunny days.

Roanoke, Virginia gets 41.9 inches of rain, on average, per year. Chantilly, Virginia gets 42.9 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Roanoke averages 15.2 inches of snow per year. Chantilly averages 21.5 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Roanoke, Virginia
Summer High: the July high is around 86.5 degrees
Winter Low: the January low is 26.1
Rain: averages 41.9 inches of rain a year
Snow: averages 15.2 inches of snow a year

Chantilly, 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

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Roanoke is 7.5 (10=best), which means it is one of the most pleasant places in Virginia.

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

Today's Weather - Chantilly, VA

66°F

Today's Weather - Roanoke, VA

66°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Chantilly / Roanoke

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

July is the hottest month for Roanoke with an average high temperature of 86.5°, which ranks it as about average compared to other places in Virginia. In Roanoke, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Roanoke are September, May and June.

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

January has the coldest nighttime temperatures for Roanoke with an average of 26.1°. This is warmer than most places in Virginia.

In Chantilly, there are 19.0 days annually when the high temperature is over 90°, which is cooler than most places in Virginia.

In Roanoke, there are 23.0 days annually when the high temperature is over 90°, which is about average compared to other places in Virginia.

In Chantilly, 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 Roanoke, there are 88.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Virginia.

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

In Roanoke, there are 0.2 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Virginia.

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


July is the wettest month in Roanoke with 4.4 inches of rain, and the driest month is February with 2.8 inches. The wettest season is Autumn with 29% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 41.9 inches in Roanoke means that it is drier than most places in Virginia.

May is the rainiest month in Chantilly 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 Chantilly, 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.

May is the rainiest month in Roanoke with 12.9 days of rain, and October is the driest month with only 8.2 rainy days. There are 120.7 rainy days annually in Roanoke, 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 21% chance of a rainy day.

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

An annual snowfall of 15.2 inches in Roanoke means that it is about average compared to other places in Virginia.

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

February is the snowiest month in Roanoke with 5.1 inches of snow, and 4 months of the year have significant snowfall.