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HomeWeather news → High Rainfall Forecasted for Tokyo on September 11, 2026
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High Rainfall Forecasted for Tokyo on September 11, 2026

September 10, 2026 · wweather1 editorial · 1 min read

An automatic weather alert from wweather1.com indicates high-severity rainfall for Tokyo, Japan, on September 11, 2026. The forecasted precipitation of 82.3 mm exceeds the threshold of 30 mm.

According to forecast data from wweather1.com, Tokyo, Japan, is expected to experience heavy rain starting on September 11, 2026, at 00:00 UTC. The event was classified under high severity after automated monitoring flagged the rising precipitation numbers.

The specific forecasted metric calls for 82.3 mm of rain on September 11, 2026. This value surpasses the system's established alert threshold of 30 mm.

The alert was automatically generated by wweather1.com based on its own forecast data models after the predicted rainfall crossed the specified threshold.

Why it is dangerous and what to do

⚠️ Safety
• Carry appropriate rain gear, such as a waterproof jacket or umbrella.
• Allow extra time for travel and exercise caution on wet roads.
• Monitor local weather reports for updated conditions throughout the day.
📊 The numbers, from wweather1 data
Tokyo: now +19°, Light rain.
That is 6° below the September climate norm.
The record for this date is +32° (2024).
Three-day forecast: 10 September: +20°/+18° · 11 September: +20°/+19° · 12 September: +26°/+19°
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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