Rio das Ostras Weather in May
What's the weather like in Rio das Ostras (Rio de Janeiro) in May 2025?
The climate in Rio das Ostras during May can be summarized as warm, humid and reasonably dry.
May is in the fall / autumn in Rio das Ostras and is typically the 5th coldest month of the year. Daytime maximum temperatures average around a muggy 26°C (79°F), whilst at night 18°C (64°F) is normal.
| Daytime temperature | 26.1°C 78.9°F |
|---|---|
| Nightly temperature | 17.9°C 64.1°F |
| Average temperature | 22°C 71.5°F |
| Daily sunshine | 7.1 hrs |
| Avg rainfall | 70 mm 2.8 ins |
| Rainy days | 13 days |
| Sea temperature | 25.1°C 77.2°F |
| Humidity | 83% |
| Windspeed | 5.7kph 4 mph |
On average May is the 5th driest month of the year in Rio das Ostras with around 70mm 2.8 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 13 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.1 hours of sunshine per day.
May temperatures in Rio das Ostras
May rainfall
May hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Rio das Ostras in May 2025.
Other monthly averages
Rio das Ostras weather stats
| Hottest month: | February | 29.3°C 84.7°F |
|---|---|---|
| Driest month: | August | 40mm 1.6ins |
| Sunniest month: | June | 7.2hrs |
| Coldest month: | July | 24.4°C 75.9°F |
| Wettest month: | December | 157mm 6.2ins |
© Google