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Dec |
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Best fit: April - May and September - November These months provide the strongest overall balance. Halong has better chances of clearer conditions, Hanoi is comfortable and Sapa is well suited to trekking and mountain views. September and early October also bring attractive rice-terrace scenery around Sapa.
Also possible: February - March and December The itinerary remains workable, but expect cooler or mistier conditions in Halong and Sapa. December can be pleasant in Hanoi but considerably colder in the mountains.
Avoid / Least Suitable: June - August These months are hotter, wetter and more humid in Hanoi, while Halong and Sapa can experience storms and heavier rainfall. Tropical weather can occasionally disrupt Halong cruises, and Sapa trekking trails may become muddy or slippery.