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Porto Alegre Weather Update: High Precipitation Recorded

September 11, 2026 · wweather1 editorial · 1 min read

Porto Alegre has experienced heavy rainfall, with recorded precipitation crossing established thresholds for the area. Residents in the affected region should monitor local conditions.

According to forecast data from wweather1.com, Porto Alegre received 48.9 mm of precipitation on September 11, 2026. This measurement exceeded the established threshold of 30 mm for the automatic weather alert system.

The high volume of rainfall began on September 11, 2026, as part of current weather patterns affecting the region. Meteorological monitoring continues as the system tracks the ongoing rain event.

Authorities and automated systems track these metrics to provide timely information regarding significant weather changes. Further updates will be provided as additional data becomes available.

Why it is dangerous and what to do

⚠️ Safety
• Stay informed by monitoring local weather reports and forecasts.
• Exercise caution if traveling on wet or flooded roads.
• Secure outdoor items that could be affected by heavy rain.
📊 The numbers, from wweather1 data
Porto Alegre: now +16°, Drizzle.
That is 3° below the September climate norm.
The record for this date is +33° (2024).
Three-day forecast: 11 September: +19°/+15° · 12 September: +18°/+13° · 13 September: +17°/+12°
The figures are computed automatically from the Open-Meteo/ERA5 archive — no eyeball estimates.

🌍 Weather in nearby cities

📰 Data source: wweather1. Forecast and analysis — wweather1, based on Open-Meteo / met.no data.

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