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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 excellent 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.
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).
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.
Best Places in Brazil in September
Find out more about the weather in Brazil and which places have the best travel conditions in this month. See all of Brazil in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
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.
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Cycling7/10 -
Walking7/10 -
Camping8/10 -
Outdoor sports7/10
Rio das Ostras 3-Day Forecast
More climate data for Rio das Ostras
See the full Rio das Ostras climate overview or explore weather in Brazil.
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