The National Center for Hydro-Meteorological Forecasting has released the weather forecast for tourists exploring Northwest Vietnam on September 23rd. The temperatures are expected to range from a low of 22-25 degrees Celsius, with some areas experiencing temperatures below 22 degrees Celsius. The high will reach between 31-34 degrees Celsius, with a mix of cloudy and sunny conditions throughout the day. However, visitors should be prepared for showers and thunderstorms, particularly in the late afternoon and evening.

For those planning to explore the mountainous regions, it is essential to dress appropriately. Comfortable and easy-to-move clothing is recommended, along with light warm clothes for those staying in higher altitudes. Tourists are also advised to monitor local weather forecasts closely before heading out.

To protect against the sun during outdoor activities, visitors should consider bringing hats, sunglasses, and sunscreen. Staying hydrated is crucial, and it is advisable to limit prolonged exposure to the sun. Sightseeing and trekking should ideally be scheduled for the morning or late afternoon.

Additionally, carrying a compact raincoat is recommended, and tourists should ensure their phones and cameras are stored in waterproof bags. If traveling by motorbike, checking the vehicle's condition is important, especially since roads may become slippery after rain. Caution should be exercised on mountain passes and slopes during thunderstorms.

In case of thunderstorms, tourists should avoid open areas and tall trees, which are prone to lightning strikes. If trekking, finding safe shelter quickly is crucial when storms arise. Visitors should not attempt to continue their journey during severe weather or low visibility conditions. Adjusting travel plans according to the weather will enhance safety and convenience.

With significant temperature variations between day and night, layering outfits is advisable. Tourists should maintain a flexible schedule to accommodate any changes due to rain or thunderstorms, and stay informed about local weather updates, particularly in mountainous areas where risks of heavy rain, thunderstorms, or landslides may occur.