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August Weather in McLean, United States

Last updated: June 24, 2025

In McLean, United States, the average temperature in August is a pleasant 23°C (74°F). Expect a minimum of 11°C (52°F) and a maximum reaching up to 35°C (95°F). During this month, you'll encounter approximately 96 mm (3.8 in) of precipitation over 11 days, with an average humidity level of 81%.

August Temperature in McLean

In August in McLean, the average temperature is 23°C (74°F). Maximums can reach 35°C (95°F), while minimums can be as low as 11°C (52°F). This makes it an ideal time for travelers to enjoy a warm climate while still being prepared for cooler evenings.

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

The chart illustrates August temperature patterns in McLean, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In McLean, August typically has an average temperature of 23°C (74°F), with highs reaching up to 35°C (95°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec283043526574777470574135
Data source: Temperature data for McLean 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 McLean

In McLean in August, the precipitation amount is 96 mm (3.8 in) spread over 11 days, resulting in a significant accumulation of rainfall.

August Precipitation Trends in McLean

The chart displays monthly precipitation patterns in McLean, 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 McLean, August typically receives around 96 mm (3.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec677012112315012311496621156554
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in McLean

In McLean in August, humidity is 81%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket draped over your skin, making travel feel a bit more sluggish and requiring plenty of water breaks to stay comfortable.

August Average Humidity in McLean

This chart illustrates the average monthly humidity levels in McLean, 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 McLean is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in McLean

In McLean in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in McLean.

Maximum UV Index Levels in McLean for August

The chart shows the monthly maximum UV Index (UVI) for McLean 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 McLean typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910111098642
Data source: McLean 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 McLean Compares to Other Months

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

This table compares monthly weather conditions in McLean, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)67 mm (2.7 inches)82%moderate
February Weather-1°C (31°F)70 mm (2.7 inches)83%moderate
March Weather6°C (43°F)121 mm (4.8 inches)84%high
April Weather11°C (52°F)123 mm (4.8 inches)85%very high
May Weather18°C (65°F)150 mm (5.9 inches)79%very high
June Weather23°C (74°F)123 mm (4.8 inches)82%extreme
July Weather25°C (77°F)114 mm (4.5 inches)80%very high
August Weather23°C (74°F)96 mm (3.8 inches)81%very high
September Weather21°C (71°F)62 mm (2.4 inches)80%very high
October Weather14°C (57°F)115 mm (4.5 inches)82%high
November Weather5°C (41°F)65 mm (2.6 inches)88%moderate
December Weather2°C (35°F)54 mm (2.1 inches)84%low

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