Climate in Rio de Janeiro

Average daytime and nighttime temperatures

All climate diagrams on this site result from the collected data from three measuring weather stations in Rio de Janeiro.
All data correspond to the average monthly values of the last 20 years.

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Rio de Janeiro is one of the coldest regions in Brazil with an average daily high temperature of only 29 degrees. It is warm or hot yearlong.
Overview: Climate in Brazil
Daylengths and sun positions in Brazil
Compare climate with other regions or countries
Sunshine hours per day
The number of hours of sunshine refers to the time when the sun is actually visible. That is, without any obstruction of visibility by clouds, fog or mountains. With 7 hours per day, August is the sunniest month in the region of Rio de Janeiro. In November, the sun shines the least.
Rain days per month
A rain day is a day on which at least 0.1 mm precipitation (=0.1 liter) per square meter falls. This can be rain, snow, hail or even dew. So it does not have to rain the whole day. With 11 rain days, December offers the most rain days, while August has the fewest.
Precipitation amount in mm/day
The amount of precipitation is measured in millimeters per square meter. Thus, at two mm/day, two liters of water fall on one square meter within 24 hours. With only 0.9 mm, the least amount of rain falls in August. January, on the other hand, has the most rain.
Map of Rio de Janeiro

Most important cities in the region »Rio de Janeiro«

Alone 4 major cities with over 500,000 inhabitants are located here. The region has a west-east extension of about 380 km and over 250 km from north to south.

CityPopulationGeo position
Rio de Janeiro6,747,81522° 54' 10"S43° 12' 27"W
Duque de Caxias916,47022° 47' 8"S43° 18' 42"W
Nova Iguaçu812,16022° 45' 33"S43° 27' 4"W
Niterói513,58022° 52' 60"S43° 6' 13"W
São João de Meriti472,41022° 48' 14"S43° 22' 20"W
Belford Roxo469,33222° 45' 51"S43° 23' 58"W
Campos dos Goytacazes458,29021° 45' 8"S41° 19' 50"W
Volta Redonda257,68622° 31' 23"S44° 6' 15"W
Petrópolis185,87622° 30' 18"S43° 10' 43"W
Barra Mansa171,12522° 32' 39"S44° 10' 17"W
Macaé143,02922° 22' 15"S41° 47' 13"W
Cabo Frio140,26922° 53' 14"S42° 1' 34"W
Queimados137,96222° 42' 58"S43° 33' 19"W
Teresópolis134,15622° 25' 0"S42° 58' 42"W
Nova Friburgo113,21722° 16' 55"S42° 31' 52"W
Itaboraí107,52722° 44' 40"S42° 51' 34"W
Itaguaí104,19522° 51' 8"S43° 46' 31"W
Nilópolis102,16122° 48' 27"S43° 24' 50"W
Rio das Ostras99,90522° 31' 37"S41° 56' 42"W
Japeri95,10122° 38' 35"S43° 39' 12"W
Barra do Piraí87,66822° 28' 12"S43° 49' 32"W
Itaperuna84,43521° 12' 18"S41° 53' 16"W
Resende77,84822° 28' 8"S44° 26' 48"W
Araruama76,87222° 52' 22"S42° 20' 35"W
Três Rios71,94422° 7' 0"S43° 12' 33"W
Angra dos Reis65,36423° 0' 24"S44° 19' 5"W
Saquarema62,05622° 55' 12"S42° 30' 37"W
Valença61,14422° 14' 44"S43° 42' 1"W
São Pedro da Aldeia55,01422° 50' 21"S42° 6' 10"W
Seropédica54,84622° 44' 38"S43° 42' 27"W

Data basis: German Weather Service, individual values averaged and supplemented by own elements. Data on cities and inhabitants:, United Nations Statistics Division and own research.
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