What September feels like in Sao Paulo
For Sao Paulo, September is early spring on the calendar (Sao Paulo is in the southern hemisphere, so the seasons run opposite to Europe and North America). Afternoons are warm and pleasant, good for long days out. After dark the temperature drops clearly: nights stay mild. The air is muggy, so it feels hotter than the thermometer suggests.
Rain in Sao Paulo in September
It is a changeable month: rain comes about one day in 4, with dry spells in between. Wet days average about 8.4 mm (0.3 in), enough to soak you without an umbrella. That is close to Sao Paulo's typical rain per wet day for the whole year (about 8.2 mm).
Daylight and sunshine in September
On 15 September the sun rises at about 6:04 am and sets around 6:00 pm local time, giving 11 h 56 min of daylight. Since mid-August the day has gained 39 min. About 77% of daylight hours are sunny; in short, there are plenty of bright spells.
How September compares to the rest of the year
September is the 5th warmest month of the year in Sao Paulo. Compared with August, afternoons are 2.2°C (4°F) warmer, with 29 mm more rain. October continues the upward trend. By October, typical highs are 25°C (77°F).
Who September suits
- Sightseeing: a good fit — comfortable enough to explore on foot all day.
- Parks & outdoor: a good fit — good conditions for sitting outside.
Tips for visiting Sao Paulo in September
Versatile Layers
Pack pieces you can take off by noon and put back on at dusk.
Rain Protection
A compact umbrella and a light waterproof jacket.
Sunglasses
Plenty of sun, so bring sunglasses and a cap.
Quick questions
How warm is Sao Paulo in September?
Afternoons average 25.1°C (77.2°F) and nights about 14.6°C (58.3°F) — warm by most people's standards. It is the 5th warmest month of the year.
Does it rain a lot in Sao Paulo in September?
Yes, fairly — rain falls about one day in 4 and totals about 67 mm, so an umbrella is worth carrying.
What should I wear in Sao Paulo in September?
The numbers point to versatile layers, rain protection and sunglasses. Add a layer for after dark.
Is September or October better for visiting Sao Paulo?
September, narrowly: it ranks #5 of 12 among Sao Paulo's months, against #7 for the other. October has more rainy days.