May weather forecast and climate
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
May is the beginning of comfortable weather conditions in Rio de Janeiro with average temperatures in the 20.6°C (69.1°F) to 26.7°C (80.1°F) range. The days are warm, but the evenings and nights see a drop in the mugginess.
The rainfall averages around 68.6mm (2.7") in May as clouds gather in the sky now and then. The seawater is warm at 23.9°C (75°F), and the absence of strong currents makes it perfect for snorkeling and swimming.
The white sandy beaches are irresistible, but so is the panoramic view of the hills near the city. Light summer clothing is suitable in May.

What is the temperature in May in Rio de Janeiro?

The average high-temperature, in May, is 26.4°C (79.5°F), while the average low-temperature is 20.4°C (68.7°F).

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

In Rio de Janeiro, in May, it is raining for 6 days, with typically 69.8mm (2.7") of accumulated precipitation.

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

In Rio de Janeiro, in May, the average water temperature is 24.3°C (75.7°F). For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 24.3°C (75.7°F).
Average temperature in May - Rio de Janeiro, Brazil
  • Average high temperature in May: 26.4°C

Warmest months (with the highest average high temperature) are January and February (30.2°C).
The month with the lowest average high temperature is July (25°C).

  • Average low temperature in May: 20.4°C

The month with the highest average low temperature is February (23.5°C).
The coldest month (with the lowest average low temperature) is July (18.4°C).

Average humidity in May - Rio de Janeiro, Brazil
  • Average humidity in May: 80%

Months with the highest relative humidity are March, April, May, October and December (80%).
Months with the lowest relative humidity are July and August (77%).

Average rainfall in May - Rio de Janeiro, Brazil
  • Average rainfall in May: 69.8mm

The wettest month (with the highest rainfall) is January (137.1mm).
The driest month (with the lowest rainfall) is July (41.9mm).

Average rainfall days in May - Rio de Janeiro, Brazil
  • Average rainfall days in May: 6 days

Months with the highest number of rainy days are January and December (11 days).
The month with the lowest number of rainy days is July (4 days).

Average sea temperature in May - Rio de Janeiro, Brazil
  • Average sea temperature in May: 24.3°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 May / Average sunshine in May - Rio de Janeiro, Brazil
  • Average daylight in May: 11h

The month with the longest days is December (Average daylight: 13.5h).
The month with shortest days is June (Average daylight: 10.7h).

  • Average sunshine in May: 6h

The month with most sunshine is February (Average sunshine: 7.2h).
Months with least sunshine are September and October (Average sunshine: 4.9).

Average UV index in May - Rio de Janeiro, Brazil
  • Average UV index in May: 7

Months with the highest UV index are January, February, March, November and December (UV index 12).
Months with the lowest UV index are June and July (UV index 5).

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