Sao Paulo is typically warm in September.

Maximum temperatures go up compared to the previous month from +73°F to +75°F. The minimum temperature also goes up from +55°F to +59°F.

It’s generally warm, but pack a long-sleeve shirt for evenings.

Take a look at how September is compared to other months in Sao Paulo:

September typically has worse weather conditions compared to August. It’s getting warmer as September arrives. The average maximum temperature goes up from +73°F to +75°F during the day. Prepare for more rain. Average rainfall goes from 51 mm to 100 mm. Humidity rises from 72% to 75%. The average wind speed doesn’t change much during September, staying around 2 m/s. The days becoming less sunny, going from 9 sunny days in August to 6 in September.

October brings much the same weather, it remains ok.

The climate in Sao Paulo in September has not changed that much over the last 43 years.

The average temperature was the lowest in 1979 (+74°F) and the highest in 2001 (+80°F). The driest year was 2007 with only 1215 mm of rainfall, and the wettest year was 2022 with 2680 mm.

For this page, we’ve looked at the typical weather in Sao Paulo, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.