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Heavy Rain Forecasted for Atami on September 30, 2026

September 29, 2026 · wweather1 editorial · 1 min read

An automatic weather alert has been issued for Atami, Japan, where rainfall is forecast to reach 45.6 mm on September 30, 2026. This forecasted precipitation exceeds the established safety threshold of 30 mm.

According to automated forecast data from wweather1.com, a high-severity rain event is expected to begin in the city of Atami, Japan, on September 30, 2026. The automatic alert was triggered when the forecasted precipitation levels crossed the designated threshold.

The forecast indicates that precipitation levels will reach 45.6 mm. This value significantly exceeds the standard threshold of 30 mm for the area, prompting the system to classify the incoming weather event as high severity.

The data generating this warning was compiled automatically by the wweather1.com forecasting system. Residents in the affected region are advised to monitor local conditions as the forecast date of September 30 approaches.

Why it is dangerous and what to do

⚠️ Safety
• Avoid low-lying areas and zones prone to flooding.
• Monitor official local weather channels for real-time updates.
• Keep emergency kits accessible and secure loose outdoor items.
📊 The numbers, from wweather1 data
Atami: now +19°, Partly cloudy.
That is 3° above the October climate norm.
The record for this date is +28° (1984).
Three-day forecast: 13 October: +22°/+16° · 14 October: +22°/+18° · 15 October: +19°/+15°
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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