Ashburn (VA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Ashburn.
Climate overview of Ashburn
The climate in Ashburn, Virginia, United States of America, is marked by large temperature swings across the seasons, ranging from 31°C (88°F) in July to 6°C (43°F) in January.
The city receives considerable rain/snowfall, with around 1058 mm (42 in) annually. October is the wettest month. It has very warm summers and cold winters. June is the sunniest month, averaging 9.4 hours of sunshine per day.
Ashburn Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Ashburn - and find the best time to visit.
Monthly Temperature in Ashburn
In Ashburn, temperatures differ significantly between summer and winter months. Typically, average maximum daytime temperatures range from a very warm 31°C (88°F) in July to a chilly 6°C (43°F) in the coolest month, January.
Nights vary from 20°C (68°F) in July to around -5°C (23°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Ashburn
Ashburn experiences significant rain/snowfall throughout the year, averaging 1058 mm (42 in) of precipitation annually. Ashburn offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between the wettest month October (130 mm (5.1 in)) and the driest month February (61 mm (2.4 in)) is not too significant. For more details, please visit our Ashburn 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 Ashburn
For those who appreciate different seasons, Ashburn serves as an ideal destination. Expect longer, more sun-filled days in June with an average of 9.4 hours of sunshine daily, and embrace the darker days in December, offering only 4.3 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Ashburn by Month
The relative humidity is high throughout the year in Ashburn.
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 Ashburn
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: September
- 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 -5°C (23°F).
Frequently asked questions about the climate in Ashburn
What is the best time to visit Ashburn?
September typically offers the most optimal weather in Ashburn. In contrast, January, February and December tend to have less optimal conditions. Ashburn has very warm summers and cold winters.
What temperatures can I expect in Ashburn?
Daytime highs range from 6°C (43°F) in January to 31°C (88°F) in July. Nighttime lows range from -5°C (23°F) to 20°C (68°F). Temperatures vary considerably through the year.
How much rain does Ashburn get?
Annual rainfall is around 1058 mm (42 in). October is the wettest month with 130 mm (5.1 in), while February is the driest with 61 mm (2.4 in).
How sunny is Ashburn?
Ashburn 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, Ashburn enjoys abundant sunshine.
Ashburn 3-Day Forecast
Ashburn on the map
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Popular this month
Where to go in August - average daytime high across popular destinations.
Kissimmee
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29°C (84°F) Big Bear Lake
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24°C (75°F) San Francisco22°C (72°F) 
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