Rio das Ostras Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Rio das Ostras.
Climate overview of Rio das Ostras
With consistently stable weather, Rio das Ostras, Rio de Janeiro State, Brazil, sees little seasonal temperature change. Daytime highs average 28°C (82°F), ranging from 31°C (88°F) in February to 26°C (79°F) in July.
Rainfall is high, totalling around 1341 mm (53 in) per year. December is the wettest month and July the driest. The city also experiences distinct dry (June to August) and wet (November to January) seasons.
Rio das Ostras Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Rio das Ostras - and find the best time to visit.
Monthly Temperature in Rio das Ostras
The climate in Rio das Ostras remains fairly constant, offering comfortable temperatures throughout the year. Average maximum daytime temperatures range from a very warm 31°C (88°F) in February, the warmest time of the year, to a comfortable 26°C (79°F) during cooler months like July.
At night, you can expect temperatures ranging from 24°C (75°F) in February to around 18°C (64°F) during July.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Rio das Ostras
Rio das Ostras is known for its substantial rainfall, with annual precipitation reaching 1341 mm (53 in). Significant seasonal changes in precipitation occur throughout the year. In the wettest month, December it receives heavy rainfall, averaging 205 mm (8.1 in) of precipitation, recorded across 21 rainy days. In contrast, the driest month July brings less rainfall, with 36 mm (1.4 in) over 11 rainy days. For more details, please visit our Rio das Ostras Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Humidity in Rio das Ostras by Month
The city experiences its highest humidity in January, reaching 82%. In April, the humidity drops to its lowest level at 80%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Rio das Ostras
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: April, May, June, July, August and September
- Warmest weather: January, February and March
- Fewest rainy days: June, July and August
- Wettest months: January, February, March, November and December, when rainfall is highest.
- Seasonal pattern: Distinct dry (June to August) and wet (November to January) seasons
Frequently asked questions about the climate in Rio das Ostras
What is the best time to visit Rio das Ostras?
April, May, June, July, August and September typically offer the most optimal weather in Rio das Ostras. In contrast, January and December tend to have less optimal conditions. Rio das Ostras has distinct dry (June to August) and wet (November to January) seasons.
What temperatures can I expect in Rio das Ostras?
Daytime highs range from 26°C (79°F) in July to 31°C (88°F) in February. Nighttime lows range from 18°C (64°F) to 24°C (75°F). Temperatures stay relatively stable year-round.
How much rain does Rio das Ostras get?
Annual rainfall is around 1341 mm (53 in). December is the wettest month with 205 mm (8.1 in), while July is the driest with 36 mm (1.4 in).
Rio das Ostras 3-Day Forecast
Rio das Ostras on the map
Rio das Ostras is highlighted - select any city to see its climate.
Popular this month
Where to go in August - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
The 10 most alternative cities in South America
Discover South America's top 10 alternative cities! From Valparaíso's vibrant streets to La Paz's high-altitude charm and Medellín's innovative spirit.
The 5 most tranquil retreats in the Amazon Rainforest, Brazil
Discover top sustainable lodges in the Amazon. Enjoy unique wildlife, eco-friendly stays, and immersive experiences at Anavilhanas, Cristalino, and more.
An alternative way to discover Rio de Janeiro
Don't feel like seeing the traditional tourist sights in Rio de Janeiro? We have made an overview of the sights in Rio de Janeiro that you must see if you want to visit Rio in an alternative way.
Iguazu Falls
Iguazu Falls are among the largest waterfalls on earth. You will be speechless when you see this miracle of mother nature. They are included in the World Heritage List and have also been named one of the seven wonders of the world.