Climate and monthly weather forecast
Rio de Janeiro, Brazil

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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

The climate of Rio de Janeiro

The climate of Rio de Janeiro, Brazil, is defined by the Köppen climate classification as Tropical wet and dry or savanna (Aw). Positioned geographically around a tropical zone, this scenic city is well-known for its unfailing tropical weather, with warm to hot temperatures throughout the year and distinct wet and dry seasons.

Temperature variations throughout the year are relatively minimal, with the monthly average highs ranging from a cooler 24°C (75.2°F) in July to a more heated 29.7°C (85.5°F) in February. On the other hand, the average low-temperature range is between 18.5°C (65.3°F) in August and 23.7°C (74.7°F) in January, meaning the nights never really get cold in Rio de Janeiro. Humidity stays fairly constant throughout the year, hovering around 78% to 82%, contributing to the warm and often muggy feel of the city.

Rainfall in Rio de Janeiro varies significantly throughout the year. The dry season, from May to August, sees far less rainfall than the rest of the year, with the average monthly rain as low as 29mm (1.14") in June. Contrastingly, during the wet season, mainly between November and March, monthly averages can reach a peak of 119mm (4.69") in November.

One noteworthy aspect of the climate in Rio is the amount of daylight it receives. Daylight hours range from a minimum of 10.7 hours per day in June to a maximum of 13.5 hours in December, indicating longer days in the summer and shorter ones in the winter.

The best time to visit Rio de Janeiro

For those seeking mostly clear skies and less rainfall, the best time to visit Rio de Janeiro is during the dry season, which lasts from May to August. During this time, rainfall levels drop considerably, and temperatures range between a pleasant 18.7°C (65.7°F) and 26.8°C (80.2°F). Moreover, the sea temperature during this period goes down to an average low of 22.1°C (71.8°F) in July, ideal for beachgoers who prefer slightly cooler swimming conditions.

The worst time to visit Rio de Janeiro

The less favorable time to visit the city would be during the wet season, specifically in November, when average rainfall increases dramatically, peaking at 119mm (4.69"). Even though temperatures remain warm ranging from 21.5°C (70.7°F) to 26.4°C (79.5°F), heavy rainfall might disrupt outdoor activities. Furthermore, the sea temperature during November is at an average of 23.2°C (73.8°F), which might be slightly chilly for some swimmers.

Spring weather in Rio de Janeiro

Spring in Rio de Janeiro, from September to November, is marked by a gradual increase in temperature and rainfall. The temperature rises from a monthly average of 25°C (77°F) in September to 26.4°C (79.5°F) in November. Despite the increase in rainfall, this time of year is usually pleasantly warm with average lows between 19.4°C (66.9°F) to 21.5°C (70.7°F).

Summer weather in Rio de Janeiro

Summer, from December to February, in Rio de Janeiro is the warmest period of the year with average high temperatures peaking at 29.7°C (85.5°F) in February. It also brings the highest rainfall of the year, particularly in January with 102mm (4.02") recorded. Despite this, longer daylight hours with 13.5 hours in December provide enough time for visitors to enjoy the city.

Autumn weather in Rio de Janeiro

The weather in Autumn, from March to May, witnesses a steady decline in temperature and a significant reduction in rainfall. Although March still experiences a substantial 85mm (3.35") of rainfall, by May, this falls to only 51mm (2.01"). With average high temperatures dropping from 28.3°C (82.9°F) in March to 25.2°C (77.4°F) in May, this season heralds the start of the dry season.

Winter weather in Rio de Janeiro

During the Winter months of June to August, Rio de Janeiro has the most temperate climate. Despite being winter, average highs still reach 24°C (75.2°F), with the lowest temperature averaging 18.5°C (65.3°F) in August. Furthermore, rainfall is at its annual lowest, with a dip to 29mm (1.14") in June, and daylight hours are the shortest. Yet, with a minimum of 10.7 hours in June, outdoor activities are hardly hindered. Winter also observes the coolest sea temperature, with an average low of 22.1°C (71.8°F) in July.

Weather in January

Kicking off the year, January in Rio de Janeiro, Brazil is characterized by a tropically warm climate with high relative humidity. An impressive 102mm (4.02") of rainfall is usually recorded, making it a noticeably soggy month. Weather in January »

Weather in February

Following January, February exhibits slight changes in the South-American city's weather conditions. Although still high, the rainfall decreases to 96mm (3.78") while the sunshine hours register a slight increase compared to the previous month. Weather in February »

Weather in March

March introduces fall in Rio de Janeiro, chaperoning milder weather compared to the scorching summer months. It's the month that sees the highest relative humidity of 81%, accompanying lower, yet still warm temperature peaks at 28.3°C (82.9°F). Weather in March »

Weather in April

As Rio de Janeiro proceeds further into autumn, April further observes a drop in the city's temperatures. The decrease in rainfall to 52mm (2.05") and a corresponding reduction in the number of rainy days paves the way for more favorable trekking conditions. Weather in April »

Weather in May

In Rio de Janeiro, May is characterized as a transitional period to the year's cooler phase. The month witnesses a further plunge in rainfall to 51mm (2.01"), marking a consistent drying trend from the rainy summer months. Despite the reduction, the temperatures, both on land at 25.2°C (77.4°F) and at sea, still maintain their warmth. Weather in May »

Weather in June

June marks the commencement of winter in Rio, but one might barely notice it, courtesy of the modest decrease in temperature, which still hovers at a balmy 24.2°C (75.6°F). Subtle adjustments in the city's climate parameters point towards chillier days ahead, but this drop is not drastic. Weather in June »

Weather in July

July in Rio de Janeiro signifies the heart of winter but also brings about the driest month of the year with only 31mm (1.22") of rain. Outdoor activities become more advisable, with fewer chances of any weather disruptions. Amidst fair weather, temperatures reach up to 24°C (75.2°F), keeping the ambiance comfortably warm in the daytime. Weather in July »

Weather in August

A modest upswing in the temperature welcomes August in Rio, as the city steps further out of winter. It's an interval between the dry season and the upcoming rainy period, bringing about adequate conditions for outdoor entertainment. Weather in August »

Weather in September

September signifies the arrival of spring in Rio de Janeiro, holding promises of new beginnings and renewed vitality. Witnessing an increase in rainfall to 47mm (1.85"), an indicator that the dry season has ended, still doesn't interfere with outdoor plans significantly. Weather in September »

Weather in October

October continues the upward trajectory in Rio's temperature scale, reinstating the city's characteristic tropical weather. With an increase in rainfall to 67mm (2.64") and longer daylight hours, it truly feels like spring has taken over. Weather in October »

Weather in November

November welcomes the pre-summer weather in Rio with temperatures elevating to 26.4°C (79.5°F), setting the stage for the city's vibrant summer life. Carrying a rainfall volume of 119mm (4.69"), it observes the year's second-highest rainfall, hinting at the approaching wet season. Weather in November »

Weather in December

To conclude the year, December brings about summer in full swing in Rio de Janeiro. An impressive peak in rainfall to 98mm (3.86") signifies the commencement of the wet season. Regardless of the showers, temperatures pace up to 28.2°C (82.8°F), radiating the summer warmth that people yearn for in a tropical city. Weather in December »

Frequently asked questions

How many days does it rain in Rio de Janeiro?

In Rio de Janeiro, during the entire year, the rain falls for 192.5 days and collects up to 812mm (31.97") of precipitation.

What is the month with the highest UV index in Rio de Janeiro?

January is the month with the highest UV index in Rio de Janeiro, with an average maximum UV index of 7.

What month is the hottest in Rio de Janeiro?

In Rio de Janeiro, February is the month with the highest recorded average temperatures, measuring a high of 29.7°C (85.5°F) and a low of 23.5°C (74.3°F).

What month has the most sunshine in Rio de Janeiro?

The month with the most sunshine in Rio de Janeiro, Brazil, is February, with an average of 8.8h of sunshine.

When is the sea warmest in Rio de Janeiro?

With an average sea temperature of 25.8°C (78.4°F), March is the month with the warmest seawater.

What is the driest month in Rio de Janeiro?

June is the month with the least rainfall in Rio de Janeiro. Rain falls for 9.8 days and accumulates 29mm (1.14") of precipitation.

What is the month with the shortest days in Rio de Janeiro?

With an average of 10h and 48min of daylight, June has the shortest days of the year.

What is the coldest time of year in Rio de Janeiro?

With average high and low temperatures of 24°C (75.2°F) and 18.7°C (65.7°F) respectively, July is Rio de Janeiro's coldest month.

What is the least humid month in Rio de Janeiro?

The least humid month in Rio de Janeiro is August, with an average relative humidity of 76%.

What month is the sea coldest in Rio de Janeiro?

September is the month with the coldest seawater in Rio de Janeiro, Brazil, with an average sea temperature of 21.6°C (70.9°F).

What is the month with the lowest UV index in Rio de Janeiro?

September is the month with the lowest UV index, with an average maximum UV index of 5.

What is the month with the least sunshine in Rio de Janeiro?

With an average of 7.5h of sunshine, October has the least sunshine of the year in Rio de Janeiro, Brazil.

What is the most humid month in Rio de Janeiro?

The most humid month in Rio de Janeiro is November, with an average relative humidity of 82%.

What is the rainiest month in Rio de Janeiro?

November is the month with the most rainfall in Rio de Janeiro, Brazil. Rain falls for 21.3 days and accumulates 119mm (4.69") of precipitation.

When are the longest days in Rio de Janeiro?

With an average of 13h and 30min of daylight, December has the longest days of the year in Rio de Janeiro, Brazil.

Is there Daylight Saving Time (DST) in Rio de Janeiro?

Rio de Janeiro does not utilize Daylight Saving Time (DST). -03 timezone is used throughout the entire year.

Average temperature
Rio de Janeiro, Brazil

Average temperature - Rio de Janeiro, Brazil

The warmest month (with the highest average high temperature) is February (85.5°F).
The month with the lowest average high temperature is July (75.2°F).

The month with the highest average low temperature is January (74.7°F).
The coldest month (with the lowest average low temperature) is August (65.3°F).

Average pressure
Rio de Janeiro, Brazil

Average pressure - Rio de Janeiro, Brazil

The month with the highest atmospheric pressure is July (30.14"Hg).
The month with the lowest atmospheric pressure is December (29.88"Hg).

Average wind speed
Rio de Janeiro, Brazil

Average wind speed - Rio de Janeiro, Brazil

The windiest months (with the highest average wind speed) are August, September and October (7mph).
The calmest month (with the lowest average wind speed) is March (5.4mph).

Average humidity
Rio de Janeiro, Brazil

Average humidity - Rio de Janeiro, Brazil

The month with the highest relative humidity is November (82%).
The month with the lowest relative humidity is August (76%).

Average rainfall
Rio de Janeiro, Brazil

Average rainfall - Rio de Janeiro, Brazil

The wettest month (with the highest rainfall) is November (4.69").
The driest month (with the least rainfall) is June (1.14").

Average rainfall days
Rio de Janeiro, Brazil

Average rainfall days - Rio de Janeiro, Brazil

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).

Average sea temperature
Rio de Janeiro, Brazil

Average sea temperature - Rio de Janeiro, Brazil

The best month for swimming (with the highest average sea temperature) is March (78.5°F).
The coldest month (with the lowest average sea temperature) is September (70.8°F).

Average daylight / Average sunshine
Rio de Janeiro, Brazil

Average daylight / Average sunshine - Rio de Janeiro, Brazil

The month with the longest days is December (Average daylight: 13h and 30min).
The month with the shortest days is June (Average daylight: 10h and 48min).

The month with the most sunshine is February (Average sunshine: 8h and 48min).
The month with the least sunshine is October (Average sunshine: 7h and 30min).

Average sunshine days
Rio de Janeiro, Brazil

Average sunshine days - Rio de Janeiro, Brazil

The month with the most sunshine days is July (20.6 days).
The month with the least sunshine days is December (4.8 days).

Average visibility
Rio de Janeiro, Brazil

Average visibility - Rio de Janeiro, Brazil

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Rio de Janeiro, Brazil

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