March weather forecast
Rio de Janeiro, Brazil

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Christ the Redeemer statue atop Mount Corcovado, overlooking the seaside city of Rio de Janeiro, Brazil
Christ the Redeemer statue atop Mount Corcovado, overlooking the seaside city of Rio de Janeiro, Brazil

Weather in March

March introduces fall in Rio de Janeiro, chaperoning milder weather compared to the scorching summer months. It's the month that sees the highest relative humidity of 81%, accompanying lower, yet still warm temperature peaks at 28.3°C (82.9°F). Coinciding with lesser daylight hours compared to the previous two months, the overall ambience becomes noticeably less intense. With a decrease in the sea temperature, those willing to brave the waves can expect a slightly cooler dip. Despite the drop in several weather metrics, March offers a more comfortable climate for outdoor ventures in Rio.

Temperature

Rio de Janeiro's weather in March displays an average high-temperature of a still warm 28.3°C (82.9°F), showing minor disparity from February's 29.7°C (85.5°F). March witnesses an average nighttime temperature of 22.9°C (73.2°F) in Rio de Janeiro.

Heat index

The heat index value for March is estimated at a tropical 33°C (91.4°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
Heat index values are typically calculated for conditions of shade and a light breeze. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.

Humidity

In March, the average relative humidity in Rio de Janeiro is 81%.

Rainfall

In Rio de Janeiro, Brazil, in March, it is raining for 22.7 days, with typically 85mm (3.35") of accumulated precipitation. Throughout the year, in Rio de Janeiro, there are 192.5 rainfall days, and 812mm (31.97") of precipitation is accumulated.

Sea temperature

With an average sea temperature of 25.8°C (78.4°F), March is the month with the warmest seawater in Rio de Janeiro.
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In Rio de Janeiro, Brazil, the average length of the day in March is 12h and 13min.
On the first day of the month, sunrise is at 05:48 and sunset at 18:20. On the last day of March, in Rio de Janeiro, sunrise is at 06:00 and sunset at 17:52 -03.

Sunshine

The average sunshine in March is 8.3h.

UV index

In March, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In March, a regular UV index of 6 translates into these guidelines:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Notice! Sand and water reflections contribute to a stronger UV exposure.

Frequently asked questions

Is it hot in Rio de Janeiro during March?

The average high-temperature, in March, in Rio de Janeiro, is 28.3°C (82.9°F), while the average low-temperature is 22.9°C (73.2°F). In March, the average heat index (a.k.a. 'real feel', 'feels like'), which represents the influence of relative humidity on air temperature, is estimated at 33°C (91.4°F).

What is the average humidity in March in Rio de Janeiro?

The average relative humidity in March in Rio de Janeiro, Brazil, is 81%.

How much does it rain in Rio de Janeiro in March?

In Rio de Janeiro, in March, during 22.7 rainfall days, 85mm (3.35") of precipitation is typically accumulated.

When is the sea warmest in Rio de Janeiro?

With an average sea temperature of 25.8°C (78.4°F), March is the month with the warmest seawater in Rio de Janeiro.

What is the sea water temperature in March in Rio de Janeiro?

In March, the average sea temperature is 25.8°C (78.4°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

How many hours of daylight does Rio de Janeiro have in March?

In March, the average day length in Rio de Janeiro, Brazil, is 12h and 13min.

When are sunrise and sunset in March in Rio de Janeiro?

In March, on the first day of the month, sunrise is at 05:48 and sunset at 18:20. On the last day of the month, in Rio de Janeiro, sunrise is at 06:00 and sunset at 17:52 -03.

How long on average sun shines in March in Rio de Janeiro?

The average sunshine duration in March in Rio de Janeiro is 8.3h.

What is the UV index intensity in March in Rio de Janeiro?

The average daily maximum UV index in March in Rio de Janeiro is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to Sun's UV rays.

Average temperature in March
Rio de Janeiro, Brazil

Average temperature in March - Rio de Janeiro, Brazil
  • Average high temperature in March: 28.3°C

The warmest month (with the highest average high temperature) is February (29.7°C).
The month with the lowest average high temperature is July (24°C).

  • Average low temperature in March: 22.9°C

The month with the highest average low temperature is January (23.7°C).
The coldest month (with the lowest average low temperature) is August (18.5°C).

Average pressure in March
Rio de Janeiro, Brazil

Average pressure in March - Rio de Janeiro, Brazil
  • Average pressure in March: 1013.9mbar

The month with the highest atmospheric pressure is July (1020.5mbar).
The month with the lowest atmospheric pressure is December (1011.9mbar).

Average wind speed in March
Rio de Janeiro, Brazil

Average wind speed in March - Rio de Janeiro, Brazil
  • Average wind speed in March: 8.7km/h

The windiest months (with the highest average wind speed) are August and September (11.3km/h).
The calmest month (with the lowest average wind speed) is March (8.7km/h).

Average humidity in March
Rio de Janeiro, Brazil

Average humidity in March - Rio de Janeiro, Brazil
  • Average humidity in March: 81%

The month with the highest relative humidity is November (82%).
The month with the lowest relative humidity is August (76%).

Average rainfall in March
Rio de Janeiro, Brazil

Average rainfall in March - Rio de Janeiro, Brazil
  • Average rainfall in March: 85mm

The wettest month (with the highest rainfall) is November (119mm).
The driest month (with the least rainfall) is June (29mm).

Average rainfall days in March
Rio de Janeiro, Brazil

Average rainfall days in March - Rio de Janeiro, Brazil
  • Average rainfall days in March: 22.7 days

The month with the highest number of rainy days is March (22.7 days).
The month with the least rainy days is July (9.3 days).

Average sea temperature in March
Rio de Janeiro, Brazil

Average sea temperature in March - Rio de Janeiro, Brazil
  • Average sea temperature in March: 25.8°C

The best month for swimming (with the highest average sea temperature) is March (25.8°C).
The coldest month (with the lowest average sea temperature) is September (21.6°C).

Average daylight in March /
Average sunshine in March
Rio de Janeiro, Brazil

Average daylight in March / Average sunshine in March - Rio de Janeiro, Brazil
  • Average daylight in March: 12h and 1min

The month with the longest days is December (Average daylight: 13h and 30min).
The month with the shortest days is June (Average daylight: 10h and 48min).

  • Average sunshine in March: 8h and 2min

The month with the most sunshine is February (Average sunshine: 8h and 48min).
The month with the least sunshine is October (Average sunshine: 7h and 30min).

Average sunshine days in March
Rio de Janeiro, Brazil

Average sunshine days in March - Rio de Janeiro, Brazil
  • Average sunshine days in March: 5 days

The month with the most sunshine days is July (20.6 days).
The month with the least sunshine days is December (4.8 days).

Average UV index in March
Rio de Janeiro, Brazil

Average UV index in March - Rio de Janeiro, Brazil
  • Average UV index in March: 6

The month with the highest UV index is January (UV index 7).
The month with the lowest UV index is September (UV index 5).

Average cloud cover in March
Rio de Janeiro, Brazil

Average cloud cover in March - Rio de Janeiro, Brazil
  • Average cloud cover in March: 38

The month with the most cloud cover is November (Cloud cover 46).
The month with the least cloud cover is February (Cloud cover 28).

Average visibility in March
Rio de Janeiro, Brazil

Average visibility in March - Rio de Janeiro, Brazil
  • Average visibility in March: 9km

The months with the highest visibility are February, May, June, July, August and September (10km).
The months with the lowest visibility are January, March, April, October, November and December (9km).

Rio de Janeiro, Brazil

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