Home → Weather news → Heavy Rain Forecast for Koeln Exceeds Threshold on September 13, 2026
Heavy Rain Forecast for Koeln Exceeds Threshold on September 13, 2026
An automated weather alert from wweather1.com projects heavy rain in Koeln, Germany, on September 13, 2026. The forecasted precipitation has crossed the high-severity threshold.
According to forecast data from wweather1.com, heavy rainfall is expected in Koeln, Germany, starting September 13, 2026. The automated weather monitoring system issued a high-severity alert for the city.
The system projects a precipitation level of 35.4 mm for the location. This measurement surpasses the standard alert threshold of 30 mm.
The alert was automatically generated from wweather1.com forecast data after the projected rainfall metric exceeded the system threshold.
Why it is dangerous and what to do
⚠️ Safety
• Stay indoors during periods of heavy rainfall when possible.
• Avoid driving through flooded streets or low-lying areas.
• Monitor local weather reports for updated conditions.
📊 The numbers, from wweather1 data
Cologne: now +18°, Overcast.
That is 1° above the September climate norm.
The record for this date is +32° (1947).
Three-day forecast: 13 September: +20°/+17° · 14 September: +23°/+17° · 15 September: +26°/+19°
The figures are computed automatically from the Open-Meteo/ERA5 archive — no eyeball estimates. 🌍 Weather in nearby cities
London
now
☁️
+19°
Berlin
now
☁️
+16°
Paris
now
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+17°
Hamburg
now
☁️
+17°
Vienna
now
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+16°
Munich
now
⛅
+15°
📰 Data source: wweather1. Forecast and analysis — wweather1, based on Open-Meteo / met.no data.