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Weather & Climate in Rio das Ostras, Brazil
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Rio das Ostras has a warm climate with an average annual temperature of 74°F (23°C). Winters average 78°F in January while summers reach 68°F in July / relatively mild seasonal variation. The area gets 250 sunny days per year, above the national average. Annual precipitation totals 47.5 inches (wetter than the 38-inch national average). The city sits at an elevation of 36 feet.
Temperature
78°F Jan (26°C)
68°F Jul (20°C)
| Annual Average | 73.5°F |
| 36% above US avg | |
| January Average | 78°F (26°C) |
| July Average | 68°F (20°C) |
| Sunny Days | 250 days/yr |
Geography
| Elevation | 36 ft (11 m) |
| Area | 131.2 sq mi (339.7 km²) |
| Population Density | 1,282/sq mi |
| Coordinates | -22.5269°N, 41.9450°W |
| Timezone | America/Sao_Paulo |
Precipitation & Snow
Air Quality
Earthquake History
1 earthquake (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.2.
| Jul 1, 2010 | 124 km SSE of São João da Barra, Brazil | M4.2 | 145 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 78°F (26°C) | 6.4 in | |
| February | 79°F (26°C) | 5.3 in | Warmest |
| March | 78°F (25°C) | 5.4 in | |
| April | 75°F (24°C) | 4.2 in | |
| May | 72°F (22°C) | 2.7 in | |
| June | 69°F (21°C) | 1.8 in | |
| July | 68°F (20°C) | 1.5 in | Coldest |
| August | 69°F (21°C) | 1.4 in | Driest |
| September | 70°F (21°C) | 2.3 in | |
| October | 73°F (23°C) | 4.0 in | |
| November | 74°F (24°C) | 5.4 in | |
| December | 77°F (25°C) | 7.1 in | Wettest |
Rio das Ostras has a seasonal temperature swing of 11°F / from 68°F in July to 79°F in February. Total annual precipitation is 47.5 inches, with December being the wettest month (7.1") and August the driest (1.4").