October Weather in Rio, United States

Last updated: August 27, 2025

In Rio, United States during October, the average temperature hovers around 10°C (51°F). Expect a wide range in temperature, with minimums dipping to -5°C (23°F) and maximums soaring to 30°C (86°F). Prepare for a precipitation total of 113 mm (4.5 in) spread over 14 days, and keep in mind the air will be quite humid, with an average humidity level of 83%.

October Temperature in Rio

In October in Rio, the average temperature is 10°C (51°F). Maximums can reach 30°C (86°F), and minimums can be as low as -5°C (23°F). When traveling during this month, it's wise to pack layers to accommodate the wide temperature range.

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

The chart illustrates October 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, October typically has an average temperature of 10°C (51°F), with highs reaching up to 30°C (86°F) and lows dropping to around -5°C (23°F).

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

October Precipitation in Rio

In Rio in October, the precipitation amount is 113 mm (4.5 in) over a period of 14 days.

October Precipitation Trends in Rio

The chart displays monthly precipitation patterns in Rio, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Rio, October typically receives around 113 mm (4.5 inches) of precipitation spread over approximately 14 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

October Humidity in Rio

In Rio in October, humidity is 83%. With an average temperature of 10°C (51°F), this humidity feels like a chilly dampness that permeates your clothes, making it essential to dress in layers for travel, as the cool air combined with the high humidity can create an uncomfortable and bone-chilling atmosphere.

October Average Humidity in Rio

This chart illustrates the average monthly humidity levels in Rio, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Rio is approximately 83%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Rio

In Rio in October, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Rio.

Maximum UV Index Levels in Rio for October

The chart shows the monthly maximum UV Index (UVI) for Rio in October, 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 October, the maximum UV index in Rio typically reaches 5, which falls under the moderate exposure category.

Data source: Rio October 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 October 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 October’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 October’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