Hanoi Weather in January
Vietnam · Humid Subtropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
January in Hanoi sees average temperatures ranging from a low of 14.3°C (57.7°F) to a high of 21.3°C (70.3°F), with a mean of 17.4°C (63.3°F). Compared to the annual average of 24.3°C (75.7°F), this month is 6.9°C cooler than the yearly norm. This is the coldest month of the year, with average lows of 14.3°C (57.7°F). Precipitation averages 58.3mm, making it approximately 123.0mm drier than the monthly average of 181.0mm. The city receives an average of 4.5 hours of sunshine per day during January, with relative humidity averaging 75.3%. Wind speeds reach an average maximum of 15.5 km/h. For travelers, this month offers a coldest month of the year experience in Hanoi, with drier-than-average conditions compared to the rest of the year.
Hanoi taught me that 'winter' in Southeast Asia is relative — but still real. I arrived in January in a t-shirt and shivered through 14°C with 85% humidity. That damp cold cuts through layers in a way the thermometer doesn't capture. Pack a fleece and light jacket November-February. The nightmare window is June-August: 33°C, 80% humidity, and downpours that flood the Old Quarter streets. May and October are the smart traveler's picks: 27°C, lower humidity, manageable rain. Always carry a compact umbrella year-round — Hanoi averages 1600mm and the rain comes fast.
January vs Adjacent Months
| Metric | December | January | February |
|---|---|---|---|
| Mean Temp | 17.6°C (63.7°F) | 17.4°C (63.3°F) | 18.7°C (65.7°F) |
| Rainfall | 15.0mm | 58.3mm | 72.2mm |
| Sunshine | 5.6 hrs | 4.5 hrs | 4.1 hrs |
| Humidity | 68.5% | 75.3% | 79.3% |
| Wind | 14.4 km/h | 15.5 km/h | 15.5 km/h |
| Rainy Days | 9.4 | 17.6 | 18.6 |
Seasonal Context
January falls in Winter in the Northern Hemisphere. Winter is the coolest season with the shortest daylight hours. For travelers visiting Hanoi in January, the data indicates favorable conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Hanoi in January?
The average temperature in Hanoi during January ranges from 14.3°C (57.7°F) to 21.3°C (70.3°F), with a mean of 17.4°C (63.3°F).
How much does it rain in Hanoi in January?
Hanoi receives an average of 58.3mm of precipitation in January, spread across approximately 17.6 rainy days.
What should I pack for Hanoi in January?
Based on January weather data, pack layers including light jackets and t-shirts, plus an umbrella.
Is January a good time to visit Hanoi?
January is a good time to visit Hanoi, with comfortable temperatures and manageable rainfall. However, it is the coldest month — pack warm clothing.
Other Months for Hanoi
Cities with Similar January Climate (Humid Subtropical)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 21.03°, 105.85°. Timezone: Asia/Ho_Chi_Minh. Last updated: 2026-07-30.