Last updated: June 24, 2025
In March, the average temperature in Rio, United States hovers around 2°C (35°F). However, temperatures can swing dramatically, with a minimum of -24°C (-11°F) and a maximum reaching 20°C (68°F). Expect about 58 mm (2.3 in) of precipitation spread over 9 days, and prepare for a high average humidity level of 85%.
In March in Rio, the average temperature is 2°C (35°F). Maximum temperatures can reach 20°C (68°F), while minimums can drop to as low as -24°C (-11°F). Be prepared for a wide range of temperatures, making it essential to pack layers for your travels.
In Rio in March, the precipitation amount is 58 mm (2.3 in) spread over 9 days.
In Rio in March humidity is 85%. With an average temperature of 2°C (35°F), this humidity feels like a damp chill that permeates your clothing, making travel uncomfortable and requiring extra layers to stay warm and dry.
In Rio in March, 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 March’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 |