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Best Time for Hanoi to Ho Chi Minh City on the Reunification Railway

Last updated: 2026-09-15

Sweet spot: January, February, November. Computed from NASA POWER climate normals across the route's overnight towns, balancing temperature, rainfall and daylight.

💡 Good to know

The most balanced cross-country window: generally clearer central-coast weather, with heat building toward May. Confirm every dated train and local opening.
Hot, humid and wet in parts of the north and south. Keep indoor alternatives, hydration and schedule margin, and confirm current rail disruptions.
The route remains usable, but central Vietnam can be wet or storm-affected from September into February while the north can be cool. Check forecasts, flood and railway disruption notices before each long leg.

Month	Low	High	Rain	Daylight
January	17.5°C	24.0°C	51 mm	11.1 h
February	18.3°C	25.8°C	21 mm	11.5 h
March	20.3°C	28.1°C	37 mm	11.9 h
April	22.7°C	30.5°C	55 mm	12.4 h
May	24.9°C	31.3°C	126 mm	12.8 h
June	25.6°C	31.2°C	131 mm	12.9 h
July	25.4°C	30.9°C	174 mm	12.9 h
August	25.3°C	30.6°C	212 mm	12.5 h
September	24.7°C	29.7°C	289 mm	12.1 h
October	23.1°C	28.1°C	349 mm	11.6 h
November	21.1°C	26.5°C	244 mm	11.2 h
December	18.4°C	24.3°C	135 mm	11.0 h

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