According to weather experts, the cold air mass is expected to begin affecting Vietnam around September 9. However, as the cold spell is forecast to be weak, it will mainly bring a slight drop in temperatures in northern areas, accompanied by scattered showers and thunderstorms.

In Hanoi, the daily high is forecast to reach around 33°C on September 9, about 2°C lower than the previous day. Temperatures are expected to fall slightly further to 31-32°C on September 10-11, with showers continuing in the capital.

Winter cold spells expected to be weaker

According to the National Centre for Hydro-Meteorological Forecasting, cold air activity from September to November 2026 is expected to be weaker than the long-term average for the same period.

This trend is forecast to continue through December 2026 and January 2027. Severe cold and damaging cold spells are likely to arrive later than usual, while the number of days affected by severe or damaging cold will be below the long-term average.

The first cold air mass in September will therefore mark a seasonal transition rather than bring widespread cold weather.

Typhoon Narra barely moves as rain and flood risks persist in northern Vietnam

VOV.VN - Typhoon Narra is barely moving over the waters north of Vietnam’s Bach Long Vi Island, while prolonged rain, rising river levels and the risk of flash floods and landslides continue across northern Vietnam.