Hanoi vs Vientiane

Hanoi and Vientiane are closely matched in May. Neither city has a clear advantage across all metrics. Your decision should come down to personal preference, cultural interests, and travel logistics rather than weather alone.

Hanoi can feel quite hot at 31°C, so plan for heat. Vientiane runs hot at 32°C.

For travelers who prioritize dry weather, Hanoi is the stronger choice in May. Vientiane receives 1 more hour of sunshine per day, which matters for sightseeing and outdoor activities.

Hanoi reaches an average high of 31°C (88°F) and drops to 24°C (75°F) at night during May. The daily temperature range is 7°C, meaning relatively stable temperatures from day to night.

Vientiane averages 32°C (90°F) for the high and 25°C (77°F) for the low, with a daily range of 7°C. The two cities feel quite similar in terms of temperature.

Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in May.

Hanoi receives approximately 230 mm of rainfall across 17 rain days during May. Rain is frequent, so waterproof gear is essential.

Vientiane sees 242 mm over 23 rain days. That makes Hanoi the drier option by 6 rain days and 12 mm of total precipitation.

Both cities share similar humidity levels at 78%.