The National Centre for Hydro-Meteorological Forecasting reported that from now until the end of April 2026, northern Vietnam is forecast to see frequent thunderstorms due to a low-pressure trough combined with successive weak cold air masses. Temperatures are expected to drop, with no widespread heatwaves anticipated.

Specifically, throughout April 20, the northern region, along with Thanh Hoa and western Nghe An, will continue to experience scattered showers and thunderstorms, with common rainfall of 15-30mm and some areas exceeding 70mm. These conditions bring a high risk of whirlwinds, lightning, and hail.

After a brief period of drier weather, another round of thunderstorms is expected from the night of April 22 to April 24.

For Hanoi, the Northern Regional Hydro-Meteorological Centre forecasts cloudy skies on April 20, with occasional showers and thunderstorms, creating cool conditions. Temperatures are expected to range from 24-26 degrees Celsius in the early morning and night, rising to 27-29 degrees during the day.

On April 21-22, Hanoi is likely to see dry weather with light southeast winds, and temperatures may increase slightly, peaking at 31-32 degrees Celsius.

Due to the influence of two additional weak cold air surges, thunderstorms are expected to return to Hanoi between April 23-25 and again from April 27 through the end of the month.

Across central Vietnam, weather conditions are expected to diverge significantly. On April 20, areas from Nghe An to Hue will see scattered showers and thunderstorms, particularly in the western regions during the afternoon and evening. From April 21, localised heat may develop.

Notably, on April 22, widespread heat is likely across the north-central and central regions. However, this will quickly give way to another round of scattered thunderstorms from April 23-25, particularly from Quang Tri to Hue, with some areas experiencing heavy rain.

Meanwhile, the south-central region, Central Highlands, and southern Vietnam will continue to see sunny conditions, with some areas experiencing heat. From around April 24-25, widespread heat is likely in the south, although isolated showers and thunderstorms may occur in the late afternoon and evening.

Caution urged during seasonal transition

Meteorological authorities noted that from mid-April to mid-May, the country may experience several widespread rainfall events, with heavier precipitation concentrated in northern mountainous areas.

Rainfall in the northern region and Thanh Hoa is expected to exceed the long-term average by 10-30mm, while other regions may face dry conditions.

Experts emphasised that this is a seasonal transition period in northern Vietnam, the Central Highlands, and the south. The interaction of different air masses increases the likelihood of extreme weather events such as whirlwinds, lightning, hail, and strong gusts, particularly following periods of intense heat.

Residents are advised to closely monitor weather developments and take proactive measures to ensure safety for both people and property.

Bao Anh