August Weather in McLean, United States

Last updated: June 24, 2025

In August, the average temperature in McLean, United States hovers around 26°C (79°F), offering a pleasantly warm climate. The mercury can dip as low as 14°C (58°F) and soar up to 40°C (105°F), showcasing a diverse range of warmth. With an average humidity of 78%, conditions can feel quite tropical. Be prepared for occasional showers, as 43 mm (1.7 in) of precipitation is expected over 8 days throughout the month.

August Temperature in McLean

In August in McLean, the average temperature is 26°C (79°F). The maximum can reach 40°C (105°F), while the minimum can drop to as low as 14°C (58°F). This makes it an ideal time for travelers to enjoy a variety of outdoor activities, ensuring you're prepared for both warm and cooler moments.

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 26°C (79°F), with highs reaching up to 40°C (105°F) and lows dropping to around 14°C (58°F).

Data source: Temperature data for McLean generated using information from the Copernicus Climate Change Service.

August Precipitation in McLean

In McLean in August, the total precipitation amount is 43 mm (1.7 in) over the course of 8 days.

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 43 mm (1.7 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

August Humidity in McLean

In McLean in August, humidity is 78%. With an average temperature of 26°C (79°F), this humidity feels like a heavy blanket wrapping around you, making travel a bit sluggish as the air hangs thick, leaving you in need of frequent breaks to hydrate and find shade.

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 78%, offering insight into how humid the weather typically is during this month.

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 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 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 11, which falls under the extreme exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	3°C (38°F)	23 mm (0.9 inches)	75%	moderate
February Weather	4°C (39°F)	15 mm (0.6 inches)	76%	high
March Weather	11°C (51°F)	59 mm (2.3 inches)	64%	very high
April Weather	14°C (58°F)	36 mm (1.4 inches)	70%	very high
May Weather	20°C (68°F)	82 mm (3.2 inches)	78%	extreme
June Weather	25°C (77°F)	59 mm (2.3 inches)	81%	extreme
July Weather	27°C (81°F)	36 mm (1.4 inches)	82%	extreme
August Weather	26°C (79°F)	43 mm (1.7 inches)	78%	extreme
September Weather	23°C (73°F)	50 mm (2.0 inches)	72%	very high
October Weather	15°C (59°F)	69 mm (2.7 inches)	73%	high
November Weather	9°C (49°F)	14 mm (0.5 inches)	80%	moderate
December Weather	6°C (42°F)	23 mm (0.9 inches)	81%	moderate