August Weather in Keys, United States

Last updated: June 24, 2025

In August, the average temperature in Keys, United States hovers around 26°C (80°F). Expect a comfortable minimum of 16°C (61°F) and a sweltering maximum reaching up to 37°C (99°F). During this time, precipitation averages 129 mm (5.1 in) over approximately 12 days, while average humidity sits at a notable 68%.

August Temperature in Keys

In August, in Keys, the average temperature is 26°C (80°F). Maximums can reach 37°C (99°F), and minimums can be as low as 16°C (61°F). This pleasant climate makes Keys an ideal destination for travelers looking to enjoy warm weather activities.

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

The chart illustrates August temperature patterns in Keys, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Keys, August typically has an average temperature of 26°C (80°F), with highs reaching up to 37°C (99°F) and lows dropping to around 16°C (61°F).

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

August Precipitation in Keys

In Keys in August, the total precipitation amount is 129 mm (5.1 in) over the course of 12 days.

August Precipitation Trends in Keys

The chart displays monthly precipitation patterns in Keys, 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 Keys, August typically receives around 129 mm (5.1 inches) of precipitation spread over approximately 12 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 Keys

In Keys in August, humidity is 68%. With an average temperature of 26°C (80°F), this humidity feels like quite a muggy embrace, making outdoor activities feel more strenuous and the air thicker, which can be a bit uncomfortable for traveling.

August Average Humidity in Keys

This chart illustrates the average monthly humidity levels in Keys, 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 Keys is approximately 68%, 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 Keys

In Keys in August, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Keys.

Maximum UV Index Levels in Keys for August

The chart shows the monthly maximum UV Index (UVI) for Keys 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 Keys typically reaches 10, which falls under the very high exposure category.

Data source: Keys 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 Keys Compares to Other Months

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

This table compares monthly weather conditions in Keys, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (40°F)	89 mm (3.5 inches)	79%	moderate
February Weather	6°C (42°F)	100 mm (4.0 inches)	78%	high
March Weather	12°C (54°F)	134 mm (5.3 inches)	75%	high
April Weather	15°C (59°F)	158 mm (6.2 inches)	75%	very high
May Weather	21°C (69°F)	212 mm (8.3 inches)	83%	very high
June Weather	26°C (78°F)	78 mm (3.1 inches)	81%	extreme
July Weather	28°C (82°F)	105 mm (4.1 inches)	78%	extreme
August Weather	26°C (80°F)	129 mm (5.1 inches)	68%	very high
September Weather	24°C (76°F)	78 mm (3.1 inches)	64%	very high
October Weather	17°C (62°F)	153 mm (6.0 inches)	71%	high
November Weather	10°C (50°F)	66 mm (2.6 inches)	82%	moderate
December Weather	7°C (45°F)	83 mm (3.3 inches)	87%	moderate