Hanoi vs Sapa: which is better, month by month
Sapa beats Hanoi in 9 of 12 months — its lead peaks in September (69 vs 44) — and they are within 3 points in December to February.
Each place is scored under the lens that suits its type — they are different kinds of destination, so the scores are each place at its own best. Comfort is SeasonMap's 0–100 estimate from ERA5 climate normals, not a forecast.
Hanoi vs Sapa — all 12 months
A month is a tie when the two are within 3 points. The widest gap is September (44 vs 69). Tap a month for that month's temperature, rain, humidity and air quality side by side.