See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
19°
Light Rain
Feels Like: 21°
Min: 18°
Max: 22°
The next few hours will be overcast, with tomorrow reaching 28°C and dropping to 18°C. The coming days will be drizzle
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
05:59
Sunrise
17:58
Sunset
Moon
Waxing Gibbous
12:36
Moonrise
01:53
Moonset
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View stargazing scoreWeather in São Paulo tomorrow, September 21, 2026
Rain features in São Paulo on September 21, 2026, so keep waterproofs handy through the day. The damp theme is strongest where shower chances rise. The morning carries the wetter risk, with rain chances near 78% and the highest odds around 00:00. Cloud is also thick early on, peaking near 86% around 00:00.
Expect highs of 28°C and cooler readings close to 19°C. Expect humidity between 53% and 93%, most humid near 18:00. A lighter breeze peaks around 12:00 near 5.6 km/h.
Afternoon showers stay in play, peaking near 58% around 16:00. Skies remain cluttered, with cover about 49% by 19:00. Expect visibility around 16.1 km. Expect sunrise at 05:58, sunset at 17:59, and 12 hours 0 minutes of sunlight today overall.
In short, treat September 21, 2026 in São Paulo as a damp day: pack covers, watch the wetter hours, and expect a high near 28°C.
Frequently asked questions about weather in São Paulo
How warm does it get in São Paulo?
The warmest month in São Paulo is February, with average high temperatures of 28°C. The average temperature during this period is around 23°C.
How cold does it get in São Paulo?
The coldest month in São Paulo is July, with average low temperatures of 12°C. The average temperature during this period is around 17°C.
What is the wettest time of year in São Paulo?
The wettest month in São Paulo is January, with an average of 220mm of precipitation.
What is the driest time of year in São Paulo?
The driest month in São Paulo is July, with an average of 20mm of precipitation.
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