Climate in Hanoi, Vietnam

Hanoi, Vietnam has a tropical climate. The annual average temperature is about 24.5°C, with around 1356 hours of sunshine; the national rainfall baseline is roughly 1799 mm across 144 rainy days a year. The warmest month is Jul (highs near 31.2°C) and the coldest is Jan (lows near 17.8°C). These are deterministic planning estimates, not a forecast or measured station data. Temperature and sunshine follow the city's latitude; rainfall and the climate zone come from a country-level baseline that every city in the country shares (refined by region in the United States, Canada and Australia), so they do not show local differences. Check current conditions with an official meteorological service before travel.

Data year 2025; last updated 2026-05-16.

Hanoi is classified as Tropical. The classification combines the city’s own temperature range, which follows its latitude, with a rainfall pattern taken at country level for Vietnam — so cities in the same country usually share a zone.

The rainfall baseline for Vietnam is about 1799 mm a year over roughly 144 rainy days, with the wettest month Jul and the driest Jan. This figure is not specific to Hanoi: every city in Vietnam carries the same baseline, so it will not show the difference between, say, a dry inland city and a wet coastal one. Use an official meteorological service for local rainfall.

Hanoi sees an estimated 1356 hours of sunshine a year, concentrated in the warmer months around Jul.

By temperature and rainfall, the most comfortable months in Hanoi are Jan, Feb, Dec. Conditions vary year to year — verify with a current forecast before booking.

Hanoi has a climate comfort score of 71/100, a comfortable year-round climate by this measure. The score weights mild temperatures most, then rainfall balance, sunshine, low seasonality, and the absence of extreme winter cold or summer heat.

• Climate in Ho Chi Minh City — Tropical, comfort 61/100
• Climate in Bangkok — Tropical, comfort 64/100
• Climate in Manila — Tropical, comfort 58/100