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.