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Rio das Ostras Weather by Month
Average temperatures, rainfall and humidity for Rio das Ostras, Brazil, month by month, built from OpenWeather’s historical records. Use it to see what a typical Rio das Ostras month looks like before you travel — then check the live Rio das Ostras forecast for the days ahead.
Warmest month
February
31°C average high
Coolest month
July
16°C average low
Wettest month
November
90 mm of rain
Driest month
July
22 mm of rain
Average temperature and rainfall in Rio das Ostras by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 31°C | 22°C | 17°C / 41°C | 65 mm | 81% | 12 km/h |
| February | 31°C | 22°C | 15°C / 43°C | 74 mm | 82% | 11 km/h |
| March | 31°C | 21°C | 13°C / 43°C | 73 mm | 82% | 10 km/h |
| April | 29°C | 20°C | 7°C / 40°C | 43 mm | 81% | 10 km/h |
| May | 27°C | 18°C | 7°C / 38°C | 55 mm | 81% | 10 km/h |
| June | 26°C | 16°C | 5°C / 36°C | 33 mm | 80% | 10 km/h |
| July | 26°C | 16°C | 7°C / 39°C | 22 mm | 78% | 12 km/h |
| August | 26°C | 16°C | 6°C / 38°C | 32 mm | 78% | 13 km/h |
| September | 27°C | 18°C | 8°C / 40°C | 38 mm | 79% | 14 km/h |
| October | 27°C | 19°C | 11°C / 38°C | 84 mm | 81% | 13 km/h |
| November | 28°C | 20°C | 11°C / 41°C | 90 mm | 83% | 12 km/h |
| December | 29°C | 21°C | 11°C / 41°C | 69 mm | 83% | 12 km/h |
Best time to visit Rio das Ostras
The most comfortable time to visit Rio das Ostras is generally June to August, balancing mild daytime temperatures against the driest stretch of the year. Temperatures stay fairly even all year and rain concentrates around November, totalling about 680 mm a year.
Travellers who prefer heat should aim for February, when highs average 31°C. November is the month to avoid if rain would spoil your plans — it averages 90 mm, roughly 4× the rainfall of the driest month (July).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Rio das Ostras forecast for what is happening now.