August Weather in Rio, United States

Last updated: August 27, 2025

In August, the average temperature in Rio, United States hovers around 22°C (71°F), with a minimum of 7°C (46°F) and a maximum reaching up to 33°C (91°F). This month experiences an average precipitation of 100 mm (3.9 in) over about 11 days, resulting in a humidity level of 76%. Prepare for a blend of warmth and occasional rain!

August Temperature in Rio

In August in Rio, the average temperature is 22°C (71°F), with maximums reaching 33°C (91°F) and minimums dropping as low as 7°C (46°F). This pleasant climate makes it an ideal time to explore the outdoors and enjoy various activities.

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

The chart illustrates August temperature patterns in Rio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio, August typically has an average temperature of 22°C (71°F), with highs reaching up to 33°C (91°F) and lows dropping to around 7°C (46°F).

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

August Precipitation in Rio

In Rio in August, the precipitation amount is 100 mm (3.9 in) over the course of 11 days.

August Precipitation Trends in Rio

The chart displays monthly precipitation patterns in Rio, 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 Rio, August typically receives around 100 mm (3.9 inches) of precipitation spread over approximately 11 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 Rio

In Rio in August, humidity is 76%. With an average temperature of 22°C (71°F), this humidity feels like traveling through a warm, dense mist that clings to your skin, making every step feel heavier and the air seem thicker, which can be quite draining for outdoor activities.

August Average Humidity in Rio

This chart illustrates the average monthly humidity levels in Rio, 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 Rio is approximately 76%, 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 Rio

In Rio 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 Rio.

Maximum UV Index Levels in Rio for August

The chart shows the monthly maximum UV Index (UVI) for Rio 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 Rio typically reaches 9, which falls under the very high exposure category.

Data source: Rio 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 Rio Compares to Other Months

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

This table compares monthly weather conditions in Rio, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	47 mm (1.9 inches)	85%	moderate
February Weather	-6°C (21°F)	52 mm (2.0 inches)	85%	moderate
March Weather	2°C (35°F)	58 mm (2.3 inches)	85%	moderate
April Weather	7°C (45°F)	98 mm (3.9 inches)	85%	very high
May Weather	15°C (59°F)	127 mm (5.0 inches)	78%	very high
June Weather	21°C (70°F)	112 mm (4.4 inches)	80%	very high
July Weather	23°C (74°F)	103 mm (4.1 inches)	78%	very high
August Weather	22°C (71°F)	100 mm (3.9 inches)	76%	very high
September Weather	18°C (65°F)	98 mm (3.8 inches)	79%	high
October Weather	10°C (51°F)	113 mm (4.5 inches)	83%	moderate
November Weather	2°C (36°F)	44 mm (1.7 inches)	88%	moderate
December Weather	-2°C (28°F)	46 mm (1.8 inches)	81%	low