March weather forecast
Rio de Janeiro, Brazil

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, the first month of the autumn in Rio de Janeiro, is also a moderately hot month, with an average temperature fluctuating between 22.9°C (73.2°F) and 28.3°C (82.9°F).

Temperature

In Rio de Janeiro, Brazil, the average high-temperature in March is practically the same as in February - a still warm 28.3°C (82.9°F). The average low-temperature, in March, is 22.9°C (73.2°F).

Heat index

In March, the average heat index is computed to be a tropical 33°C (91.4°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'apparent temperature', 'feels like', or 'felt air temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, wind, clothing). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

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

Rainfall

In Rio de Janeiro, in March, it is raining for 22.7 days, with typically 85mm (3.35") of accumulated precipitation. In Rio de Janeiro, during the entire year, the rain falls for 192.5 days and collects up to 812mm (31.97") of precipitation.

Sea temperature

March is the month with the warmest seawater in Rio de Janeiro, Brazil, with an average sea temperature of 25.8°C (78.4°F).
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 March, the average length of the day in Rio de Janeiro is 12h and 13min.
On the first day of March in Rio de Janeiro, sunrise is at 05:48 and sunset at 18:21. On the last day of the month, sunrise is at 06:00 and sunset at 17:53 -03.

Sunshine

In Rio de Janeiro, the average sunshine in March is 8.3h.

UV index

The average daily maximum UV index in March in Rio de Janeiro, Brazil, is 6. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: The average daily UV index of 6 in March transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in March in Rio de Janeiro?

In Rio de Janeiro, Brazil, in March, the average high-temperature is 28.3°C (82.9°F), and the average low-temperature is 22.9°C (73.2°F). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in March is computed to be 33°C (91.4°F).

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

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

How many days does it rain in March in Rio de Janeiro?

In Rio de Janeiro, Brazil, in March, it is raining for 22.7 days, with typically 85mm (3.35") of accumulated precipitation.

What is the month with the warmest sea water 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.

How warm is the water in March in Rio de Janeiro?

In Rio de Janeiro, Brazil, the average seawater temperature in March is 25.8°C (78.4°F). 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.

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

The average day length in March in Rio de Janeiro is 12h and 13min.

What time 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 18:21. On the last day of the month, in Rio de Janeiro, Brazil, sunrise is at 06:00 and sunset at 17:53 -03.

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

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

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

In Rio de Janeiro, the average daily maximum UV index in March is 6. A UV Index of 6 to 7 symbolizes a high health threat from unprotected exposure to UV radiation.

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).

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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).

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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).

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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%).

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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).

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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).

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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).

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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 13min

The month with the longest days is December (Average daylight: 13h and 31min).
The month with the shortest days is June (Average daylight: 10h and 45min).

  • Average sunshine in March: 8.3h

The month with the most sunshine is February (Average sunshine: 8.8h).
The month with the least sunshine is October (Average sunshine: 7.5h).

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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).

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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).

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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).

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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).

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