São Sebastião Weather in September

September in São Sebastião typically sees daytime highs of 23°C (73°F) and nighttime lows of 19°C (66°F). Rainfall is also possible this month, so it's worth packing an umbrella.

Rainfall in São Sebastião in September

Records from the past 30 years suggest around 12 days of rain, with 134 mm (5.3 in) average for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in São Sebastião in September

September in São Sebastião brings high temperatures, with highs of 23°C (73°F) and nights around 19°C (66°F). Overall, the month follows a fairly predictable daily temperature pattern. At 19°C (66°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in São Sebastião in September

This month sees fewer sunny days, with about 80 hours of sunshine, perfect for those who enjoy cooler temperatures.

If you prefer dry days with pleasant temperatures, June, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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

São Sebastião Temperature in September

Min Temperature 19°C (66°F)  

Max Temperature 23°C (73°F)  

Chance of Rain 41%  

Precipitation 134 mm (5.3 in)  

Rainy days 12 days  

Sunshine 80 hours *  

Percentage Sunshine *  

* Data from: Ubatuba, Brazil (53 KM, 33 Miles).

What to Wear in São Sebastião in September

For São Sebastião in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Sunglasses aren't essential this month, though you might want them for the occasional bright moment.

What To Do in São Sebastião in September

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

Swimming

4/10

Cycling

9/10

Walking

9/10

Camping

6/10

Outdoor sports

9/10

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 São Sebastião's climate page.

More climate data for São Sebastião

Temperature Rainfall Sunshine

See the full São Sebastião climate overview or explore weather in Brazil.