Climate in Rio de Janeiro

Average daytime and nighttime temperatures

All climatic 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 centigrade. It is yearlong warm or hot.
Overview: Climate in Brazil
Daylengths and sun positions in Brazil
Compare climate with other regions or countries
Hours of sunshine per daySunshine hours per day in Rio de Janeiro
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 state of Rio de Janeiro. In November the sun shines the shortest.
Rainy days per monthRainy days per month in Rio de Janeiro
A rainy day is a day on which at least an amount of 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 rainy days, December offers the most number of rainy days, and in August the least.
Precipitation in mm/dayPrecipitation in Rio de Janeiro
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 rain falls in August. January, on the other hand, has the most rain.
Map of Rio de Janeiro

Most important cities in the federal state »Rio de Janeiro«

Alone 4 major cities with over 500,000 inhabitants are located here. The federal state 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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