Chantilly (VA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Chantilly.
Climate overview of Chantilly
Temperatures in Chantilly, Virginia, United States of America, vary greatly throughout the year. July is the hottest month at 31°C (88°F), while January is the coldest at 6°C (43°F).
Rain/snowfall is high, totalling around 1158 mm (46 in) per year. October is the wettest month and February the driest. The city also experiences very warm summers and cold winters. Sunshine peaks in June, when the city sees around 9.4 hours of sunshine per day.
Chantilly Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Chantilly - and find the best time to visit.
Monthly Temperature in Chantilly
The climate in Chantilly is known for significant temperature differences throughout the year, making the weather dynamic. Average maximum daytime temperatures range from a very warm 31°C (88°F) in July, the warmest time of the year, to a chilly 6°C (43°F) during cooler months like January.
At night, you can expect temperatures ranging from 20°C (68°F) in July to around -4°C (25°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Chantilly
Chantilly has a notably wet climate with abundant precipitation, recording 1158 mm (46 in) of rain/snowfall per year. While rainfall varies throughout the year, each season offers its own charm. October brings wetter days averaging 139 mm (5.5 in) of precipitation, spread over 11 rainy days.
In contrast, the driest month February experiences a drier climate, with about 64 mm (2.5 in) of rainfall spread across 10 rainy days. For more details, please visit our Chantilly Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Chantilly
Seasonal changes in sunshine hours are quite dramatic in Chantilly. While June receives considerable daily sunshine with up to 9.4 hours, December marks the darkest time of the year, where sunshine is scarce with only 4.3 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Chantilly by Month
The relative humidity is high throughout the year in Chantilly.
The city experiences its highest humidity in August, reaching 69%. In March, the humidity drops to its lowest level at 58%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Chantilly
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: April, May, June, September and October
- Warmest weather: July and August
- Most sunshine: June and July
- Seasonal pattern: Very warm summers and cold winters
- Coldest conditions: January, with freezing nights around -4°C (25°F).
Frequently asked questions about the climate in Chantilly
What is the best time to visit Chantilly?
April, May, June, September and October typically offer the most optimal weather in Chantilly. In contrast, January, February and December tend to have less optimal conditions. Chantilly has very warm summers and cold winters.
What temperatures can I expect in Chantilly?
Daytime highs range from 6°C (43°F) in January to 31°C (88°F) in July. Nighttime lows range from -4°C (25°F) to 20°C (68°F). Temperatures vary considerably through the year.
How much rain does Chantilly get?
Annual rainfall is around 1158 mm (46 in). October is the wettest month with 139 mm (5.5 in), while February is the driest with 64 mm (2.5 in).
How sunny is Chantilly?
Chantilly receives around 2,520 hours of sunshine per year. June is the sunniest month with 282 hours, while December is the cloudiest with just 130 hours. Overall, Chantilly enjoys abundant sunshine.
Chantilly 3-Day Forecast
Chantilly on the map
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Popular this month
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