August Weather in Heathrow, United States

Last updated: June 24, 2025

In August, the average temperature in Heathrow, United States reaches a warm 28°C (82°F). However, temperatures can vary, with minimums dipping to 23°C (74°F) and maximums rising to a steamy 35°C (94°F). Expect a significant precipitation amount of 222 mm (8.7 in) spread across 27 days, along with average humidity hovering around 81%.

August Temperature in Heathrow

In August in Heathrow, the average temperature is 28°C (82°F). The maximum can reach 35°C (94°F), while the minimum can be as low as 23°C (74°F). This pleasant climate makes Heathrow an ideal destination for traveling and enjoying outdoor activities during this time.

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

The chart illustrates August temperature patterns in Heathrow, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Heathrow, August typically has an average temperature of 28°C (82°F), with highs reaching up to 35°C (94°F) and lows dropping to around 23°C (74°F).

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

August Precipitation in Heathrow

In Heathrow in August, the total precipitation amount is 222 mm (8.7 in) spread over a period of 27 days.

August Precipitation Trends in Heathrow

The chart displays monthly precipitation patterns in Heathrow, 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 Heathrow, August typically receives around 222 mm (8.7 inches) of precipitation spread over approximately 27 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 Heathrow

In Heathrow in August, humidity is 81%. With an average temperature of 28°C (82°F), this humidity feels like a warm blanket wrapped around you, making traveling somewhat uncomfortable as the air thickens, leaving you longing for a refreshing breeze.

August Average Humidity in Heathrow

This chart illustrates the average monthly humidity levels in Heathrow, 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 Heathrow is approximately 81%, 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 Heathrow

In Heathrow 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 Heathrow.

Maximum UV Index Levels in Heathrow for August

The chart shows the monthly maximum UV Index (UVI) for Heathrow 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 Heathrow typically reaches 11, which falls under the extreme exposure category.

Data source: Heathrow 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 Heathrow Compares to Other Months

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

This table compares monthly weather conditions in Heathrow, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (61°F)	37 mm (1.5 inches)	83%	moderate
February Weather	19°C (66°F)	56 mm (2.2 inches)	80%	very high
March Weather	20°C (68°F)	25 mm (1.0 inches)	75%	very high
April Weather	22°C (72°F)	75 mm (3.0 inches)	70%	extreme
May Weather	25°C (77°F)	107 mm (4.2 inches)	68%	extreme
June Weather	27°C (81°F)	199 mm (7.9 inches)	75%	extreme
July Weather	27°C (82°F)	216 mm (8.5 inches)	79%	extreme
August Weather	28°C (82°F)	222 mm (8.7 inches)	81%	extreme
September Weather	27°C (81°F)	165 mm (6.5 inches)	83%	extreme
October Weather	25°C (77°F)	82 mm (3.2 inches)	81%	very high
November Weather	20°C (69°F)	44 mm (1.7 inches)	82%	high
December Weather	17°C (63°F)	62 mm (2.4 inches)	84%	moderate