Rio das Ostras Weather in September

September in Rio das Ostras typically sees daytime highs of 27°C (81°F) and nighttime lows of 20°C (68°F). Rainfall is also possible this month, so it's worth packing an umbrella.

Rainfall in Rio das Ostras in September

Historically, September sees about 12 days of rain, with a monthly average of 76 mm (3 in). Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.

Temperature in Rio das Ostras in September

If you're visiting Rio das Ostras in September, expect perfect temperatures with highs of 27°C (81°F) and overnight lows of 20°C (68°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights cool down to 20°C (68°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit Rio das Ostras.

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For a detailed overview over the year and the best time to visit Brazil, check out our Rio das Ostras's climate page.

Rio das Ostras Temperature in September

Min Temperature 20°C (68°F)  

Max Temperature 27°C (81°F)  

Chance of Rain 40%  

Precipitation 76 mm (3 in)  

Rainy days 12 days  

Humidity 81% *  

* Data from: Cabo Frio, Brazil (40 KM, 25 Miles).

What to Wear in Rio das Ostras in September

Warm but pleasant conditions in Rio das Ostras in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Wet weather is likely, so pack waterproof gear for multiple rainy days.

What To Do in Rio das Ostras in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

7/10

Walking

7/10

Camping

8/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Brazil, check out our Rio das Ostras's climate page.

More climate data for Rio das Ostras

Temperature Rainfall Humidity

See the full Rio das Ostras climate overview or explore weather in Brazil.