March Weather in Rio, United States

Last updated: August 27, 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%.

March Temperature in Rio

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.

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

The chart illustrates March 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, March typically has an average temperature of 2°C (35°F), with highs reaching up to 20°C (68°F) and lows dropping to around -24°C (-11°F).

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

March Precipitation in Rio

In Rio in March, the precipitation amount is 58 mm (2.3 in) spread over 9 days.

March Precipitation Trends in Rio

The chart displays monthly precipitation patterns in Rio, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Rio, March typically receives around 58 mm (2.3 inches) of precipitation spread over approximately 9 days.

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

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Millimeters (mm) Inches (in)

March Humidity in Rio

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.

March Average Humidity in Rio

This chart illustrates the average monthly humidity levels in Rio, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Rio is approximately 85%, offering insight into how humid the weather typically is during this month.

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

March UV Index in Rio

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.

Maximum UV Index Levels in Rio for March

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

Data source: Rio March 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 March 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 March’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 March’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