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Vientiane Forecasted to Receive 43.1 mm of Rain on September 18, 2026

September 18, 2026 · wweather1 editorial · 1 min read

An automatic weather alert has been issued for Vientiane, Laos, where rainfall is forecast to reach 43.1 mm on September 18, 2026. This projected precipitation exceeds the established safety threshold of 30 mm, triggering a high-severity alert.

According to forecasting data from wweather1.com, a high-severity rain event is projected to begin in Vientiane, Laos, on September 18, 2026, starting at 00:00 UTC. The automated system generated the alert after the forecast metric for precipitation crossed the safety threshold.

The predicted rainfall value for the area is 43.1 mm. This measurement exceeds the standard threshold of 30 mm set for the region, indicating a substantial weather event for the city.

The warning is based on automatic forecast data from wweather1.com. Residents in Vientiane are advised to prepare for wet conditions throughout the day on September 18, 2026.

Why it is dangerous and what to do

⚠️ Safety
• Keep clear of low-lying areas prone to sudden water accumulation.
• Secure loose outdoor items that could be affected by heavy rain.
• Monitor local news channels and weather updates for real-time conditions.
📊 The numbers, from wweather1 data
Vientiane: now +24°, Mostly clear.
That is 2° above the October climate norm.
The record for this date is +32° (1966).
Three-day forecast: 13 October: +31°/+24° · 14 October: +31°/+24° · 15 October: +31°/+24°
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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