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Istanbul Weather Forecast: 30.8 mm of Precipitation Expected

November 3, 2026 · wweather1 editorial · 1 min read

A high-severity rainfall event is forecast for Istanbul on November 4, 2026, with expected precipitation reaching 30.8 mm. This automatic alert is generated from wweather1.com forecast data as the value crosses the established threshold.

wweather1.com has issued an automatic forecast alert for Istanbul, Turkey, indicating high-severity precipitation for November 4, 2026. According to the automated meteorological data, the forecast indicates that rainfall will total 30.8 mm.

This projected total exceeds the designated threshold of 30 mm, triggering the high-severity classification in the automated monitoring system. The forecast period begins on November 4, 2026, at 00:00:00 UTC.

Residents and local authorities in the affected area are advised to monitor the developing weather conditions closely as the forecast value remains above the alert threshold.

Why it is dangerous and what to do

⚠️ Safety
• Monitor official weather updates and forecasts from wweather1.com.
• Exercise caution while traveling in areas prone to heavy rain.
• Ensure proper drainage around residential properties.
📊 The numbers, from wweather1 data
Istanbul: now +15°, Overcast.
That is 3° above the November climate norm.
The record for this date is +27° (2023).
Three-day forecast: 4 November: +17°/+13° · 5 November: +13°/+10° · 6 November: +12°/+8°
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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