Home → Weather news → High Severity Rain Forecast for Sao Paulo on September 1, 2026
High Severity Rain Forecast for Sao Paulo on September 1, 2026
An automatic weather alert from wweather1.com indicates high severity rain forecasted for Sao Paulo, Brazil, on September 1, 2026. Expected precipitation levels of 42.9 mm have crossed the 30 mm system threshold.
Automated forecast data from wweather1.com has triggered a high-severity rain alert for the city of Sao Paulo, Brazil. The alert was automatically generated for the forecast date of September 1, 2026.
According to the forecast metrics, rainfall is expected to reach 42.9 mm. This exceeds the established monitoring threshold of 30 mm set for precipitation events.
The event was recorded in the system starting at 00:00:00.000Z on September 1, 2026. The notification was produced entirely from wweather1.com's internal forecast data.
Why it is dangerous and what to do
⚠️ Safety
• Stay informed by checking local weather updates and advisories.
• Avoid driving or walking through flooded areas.
• Exercise caution on roadways and allow additional travel time during heavy rain.
📊 The numbers, from wweather1 data
São Paulo: now +19°, Drizzle.
That is 3° below the September climate norm.
The record for this date is +33° (1963).
Three-day forecast: 1 September: +21°/+14° · 2 September: +20°/+12° · 3 September: +25°/+11°
The figures are computed automatically from the Open-Meteo/ERA5 archive — no eyeball estimates. 🌍 Weather in nearby cities
São Paulo
now
🌦️
+19°
Rio de Janeiro
now
⛅
+24°
Belo Horizonte
now
🌙
+19°
Curitiba
now
☁️
+16°
Guarulhos
now
🌦️
+19°
Campinas
now
🌦️
+20°
📰 Data source: wweather1. Forecast and analysis — wweather1, based on Open-Meteo / met.no data.