The National Center for Hydro-Meteorological Forecasting has provided an updated weather forecast for October 3 across Vietnam. In the northern region, particularly in Hanoi, the day will be hot with temperatures peaking between 34 and 36 degrees Celsius. There will be some clouds, with possible rain and thunderstorms in the evening.

In the northern mountainous areas, temperatures are expected to range from 24 to 27 degrees Celsius, while the western mountainous regions may see temperatures drop to 20-23 degrees Celsius. The forecast suggests that there will be some clouds, with a chance of rain and thunderstorms in the evening.

In the northeastern region, temperatures will range from 25 to 28 degrees Celsius, with highs reaching 32 to 35 degrees Celsius. The weather will be similar to that of the northwest, with some clouds and possible rain in the evening.

From Thanh Hoa to Hue, the temperatures will be between 25 and 28 degrees Celsius, with highs around 32 to 35 degrees Celsius. The weather will be partly cloudy with chances of rain and thunderstorms in the evening.

In the south-central coastal areas, temperatures will range from 25 to 28 degrees Celsius, with highs of 31 to 34 degrees Celsius. The forecast indicates some clouds and scattered rain and thunderstorms in the evening.

The Central Highlands will see temperatures ranging from 20 to 23 degrees Celsius, with highs between 29 and 32 degrees Celsius. The weather will be partly cloudy with possible rain in the evening.

In the southern region, temperatures are expected to be between 24 and 27 degrees Celsius, with highs of 31 to 34 degrees Celsius. Similar to other regions, there will be some clouds and scattered rain in the afternoon and evening.

Overall, the weather across the country will be influenced by a cold front beginning October 4, which is expected to bring more rain and cooler temperatures, particularly in the northern regions.