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August Weather in Ashburn, United States

Last updated: June 24, 2025

In Ashburn, United States, the average temperature in August hovers around 28°C (83°F), creating a warm climate perfect for exploration. However, be prepared for temperature fluctuations, as it can dip to a minimum of 18°C (65°F) and soar to a maximum of 39°C (102°F). With 108 mm (4.2 in) of precipitation spread over 19 days, you might encounter some rainy spells. The average humidity level rests at a comfortable 79%, ensuring that your adventures remain pleasantly refreshing.

August Temperature in Ashburn

In August in Ashburn, the average temperature is 28°C (83°F). The maximum can reach 39°C (102°F), while the minimum can be as low as 18°C (65°F). This weather makes it a great time for travelers to enjoy outdoor activities and explore the vibrant local culture.

August Weather in Ashburn: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Ashburn, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ashburn, August typically has an average temperature of 28°C (83°F), with highs reaching up to 39°C (102°F) and lows dropping to around 18°C (65°F).
JanFebMarAprMayJunJulAugSepOctNovDec525762677580838280725854
Data source: Temperature data for Ashburn generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Ashburn

In Ashburn in August, the precipitation amount is 108 mm (4.2 in), occurring over a span of 19 days.

August Precipitation Trends in Ashburn

The chart displays monthly precipitation patterns in Ashburn, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Ashburn, August typically receives around 108 mm (4.2 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec791158610481951141081159056119
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Ashburn

In Ashburn in August humidity is 79%. With an average temperature of 28°C (83°F), this humidity feels like a thick blanket wrapping around you, making outdoor activities a challenge but also adding a certain tropical charm to your travel experience.

August Average Humidity in Ashburn

This chart illustrates the average monthly humidity levels in Ashburn, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Ashburn is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%82%80%76%73%74%80%79%83%77%84%88%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Ashburn

In Ashburn in August, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Ashburn.

Maximum UV Index Levels in Ashburn for August

The chart shows the monthly maximum UV Index (UVI) for Ashburn in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in Ashburn typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589101111111110864
Data source: Ashburn August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How August Weather in Ashburn Compares to Other Months

Weather in Ashburn varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Ashburn, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Ashburn, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (52°F)79 mm (3.1 inches)85%moderate
February Weather14°C (58°F)115 mm (4.5 inches)82%very high
March Weather17°C (62°F)86 mm (3.4 inches)80%very high
April Weather19°C (67°F)104 mm (4.1 inches)76%very high
May Weather24°C (76°F)81 mm (3.2 inches)73%extreme
June Weather27°C (81°F)95 mm (3.8 inches)74%extreme
July Weather28°C (83°F)114 mm (4.5 inches)80%extreme
August Weather28°C (83°F)108 mm (4.2 inches)79%extreme
September Weather26°C (80°F)114 mm (4.5 inches)83%very high
October Weather22°C (72°F)90 mm (3.5 inches)77%very high
November Weather15°C (58°F)56 mm (2.2 inches)84%high
December Weather12°C (54°F)119 mm (4.7 inches)88%moderate

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