Last updated: June 24, 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%.
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.
In Rio in October, the precipitation amount is 113 mm (4.5 in) over a period of 14 days.
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.
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.
UV Risk Categories
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.
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 |