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High Rainfall Forecast Issued for Negombo

September 23, 2026 · wweather1 editorial · 1 min read

A high-severity rain event is forecast for Negombo on September 24, 2026, with precipitation expected to reach 39.5 mm.

According to automated forecast data from wweather1.com, precipitation levels in Negombo are projected to cross the established threshold of 30 mm.

The forecasted rainfall value of 39.5 mm has triggered a high-severity weather alert for the area, beginning on September 24, 2026.

Residents and visitors in Negombo are advised to monitor official weather updates as conditions develop.

Why it is dangerous and what to do

⚠️ Safety
• Monitor local weather forecasts and official updates.
• Ensure drainage systems around properties are clear.
• Exercise caution while traveling on wet roads.
📊 The numbers, from wweather1 data
Negombo: now +25°, Rain showers.
That is 1° below the September climate norm.
The record for this date is +30° (2024).
Three-day forecast: 23 September: +30°/+25° · 24 September: +28°/+25° · 25 September: +28°/+25°
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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