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May Weather in Ashburn, United States

Last updated: June 24, 2025

In May, the average temperature in Ashburn, United States hovers around 24°C (76°F). Expect a wide range, with temperatures dipping to a minimum of 9°C (49°F) and peaking at a sizzling 36°C (98°F). Visitors should also prepare for 81 mm (3.2 in) of precipitation spread over 9 days, contributing to an average humidity of 73%.

May Temperature in Ashburn

In May in Ashburn, the average temperature is 24°C (76°F). Maximums can reach 36°C (98°F), while minimums can drop as low as 9°C (49°F). This diverse climate makes Ashburn an ideal destination for travelers seeking to enjoy both warm days and cool evenings.

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

The chart illustrates May 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, May typically has an average temperature of 24°C (76°F), with highs reaching up to 36°C (98°F) and lows dropping to around 9°C (49°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.

May Precipitation in Ashburn

In Ashburn in May, the precipitation amount is 81 mm (3.2 in) spread over a duration of 9 days.

May Precipitation Trends in Ashburn

The chart displays monthly precipitation patterns in Ashburn, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Ashburn, May typically receives around 81 mm (3.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec791158610481951141081159056119
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Ashburn

In Ashburn in May humidity is 73%. With an average temperature of 24°C (76°F), this humidity feels like a warm and sticky embrace, making travel slightly uncomfortable as the air thickens around you, prompting you to seek shade and stay hydrated.

May Average Humidity in Ashburn

This chart illustrates the average monthly humidity levels in Ashburn, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Ashburn is approximately 73%, 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 May generated using information from the Copernicus Climate Change Service.

May UV Index in Ashburn

In Ashburn in May, 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 May

The chart shows the monthly maximum UV Index (UVI) for Ashburn in May, 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 May, the maximum UV index in Ashburn typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589101111111110864
Data source: Ashburn May 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 May 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 May’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 May’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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