Rio de Janeiro, Brazil: Geography and climate

Climate of Rio de Janeiro (Brazil)

Climate chart, Rio de Janeiro Temperature chart, Rio de Janeiro

Summer starts here at the end of January and ends in December. There are the months of summer: December, January, February, March.

The best time to visit are January, February, March, April, May, September, October, November, December.

The highest relative humidity is in April (81.39). The lowest is in September (74.99 %).

On average, December (16.47 days) has the rainiest days in the month. The least rainy days are in June (7.63 days).

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The climate in the city of Rio de Janeiro is close to tropical. There is a lot of precipitation in summer, while there is very little in winter. The climate here is classified as Aw by the Keppen-Heiger system. The average annual temperature is 23.6 °C in Rio de Janeiro. There is about 1252 mm of precipitation per year.

Rio de Janeiro climate chart

Climate chart, Rio de Janeiro

The driest month is August, with 45 mm of precipitation. Most rainfall here falls in January, averaging 172 mm.

Rio de Janeiro Temperature Graph

Temperature chart, Rio de Janeiro

February is the warmest month of the year. Temperatures in February average 27.0 °C. July is the coldest month, with temperatures averaging 20.1 °C.

Rio de Janeiro climate chart

Average temperature (°C) minimum temperature (°C) highest temperature (°C) Precipitation (mm) Humidity (%) Rainy days (D) Long day (hours)
January 26.7 23.3 31.2 172 79% 12 10.0
February 27 23.3 31.7 117 78% 10 10.0
March 25.9 22.7 30.2 153 81% 12 9.0
April 24.3 21.1 28.5 99 81% 10 8.0
May 21.8 18.2 26.2 81 81% 8 7.0
June 20.8 16.8 25.8 52 80% 6 7.0
July 20.1 16 25.4 55 79% 6 7.0
August 20.9 16.5 26.5 45 76% 6 7.0
September 22.2 18.1 27.5 81 75% 8 7.0
October 23.7 20 28.6 98 76% 9 7.0
November 24.2 21 28.5 143 80% 12 8.0
December 25.8 22.4 30.1 156 80% 12 9.0
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January February March April May June July August September October November December
Average temperature (°C) 26.7 27 25.9 24.3 21.8 20.8 20.1 20.9 22.2 23.7 24.2 25.8
minimum temperature (°C) 23.3 23.3 22.7 21.1 18.2 16.8 16 16.5 18.1 20 21 22.4
highest temperature (°C) 31.2 31.7 30.2 28.5 26.2 25.8 25.4 26.5 27.5 28.6 28.5 30.1
Precipitation (mm) 172 117 153 99 81 52 55 45 81 98 143 156
Humidity(%) 79% 78% 81% 81% 81% 80% 79% 76% 75% 76% 80% 80%
Rainy days (D) 12 10 12 10 9 6 6 6 8 9 12 12
Long day (hours) 9.8 10.0 8.8 7.9 7.2 7.0 6.9 7.3 7.2 7.4 7.7 8.8

Data: 1991 – 2021 minimum temperature (°C), maximum temperature (°C), Rainfall rate (mm), Humidity, Rainy days. Data: 1999 – 2019: Longitude of the day.

There is a difference of 127 mm of precipitation between a dry month and a rainy month. Throughout the year, temperatures range from 6.8 °C. Useful tips about reading the climate table: For each month, you will find data on precipitation (mm), average, maximum and minimum temperature (in degrees Celsius and Fahrenheit). Value of the first line: (1) January (2) February (3) March (4) April (5) May, (6) June (7) July (8) August (9) September , (10) October (11) November (12) December.

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