Climate averages 1991–2020
Hanoi weather
in January.
A mild, moderately wet month: the coolest and the 3rd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
January is a mild month in Hanoi: daytime highs average 19.6°C and nights cool to about 13.6°C. By daytime temperature it is the coolest month of the year.
Expect about 40 mm of rain on roughly 8 days, which makes January a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 00 min on an average January day.
The nearest other city in this atlas is Tây Hồ (6 km away). In January its highs average 19.4°C, about as warm as Hanoi, with 40 mm of rain.
Among the 136 cities listed in Vietnam, Hanoi ranks joint 106th of 136 for the warmest January highs and joint 96th of 136 for the driest January (rainfall, lowest first). The mean January high of those 136 cities is 24.8°C; Hanoi is 5.2°C cooler than that mean.
From January to February, average highs rise by 2.1°C to 21.7°C, and monthly rainfall falls from 40 mm to 27 mm.
The annual picture
January in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Hanoi climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 19.6°C13.6°C | 13.6°C | 40 | 7.7 | 11.011 h |
| February | 21.7°C15.2°C | 15.2°C | 27 | 6.8 | 11.411 h |
| March | 24.9°C18.1°C | 18.1°C | 52 | 9.6 | 12.012 h |
| April | 28.8°C21.6°C | 21.6°C | 100 | 11.1 | 12.613 h |
| May | 31.1°C24.2°C | 24.2°C | 232 | 17.5 | 13.113 h |
| June | 32.6°C26.0°C | 26.0°C | 226 | 18.3 | 13.413 h |
| July | 32.3°C26.0°C | 26.0°C | 259 | 20.4 | 13.313 h |
| August | 31.4°C25.4°C | 25.4°C | 314 | 22.5 | 12.813 h |
| September | 30.3°C24.1°C | 24.1°C | 226 | 18.7 | 12.312 h |
| October | 28.2°C21.5°C | 21.5°C | 121 | 11.9 | 11.712 h |
| November | 25.0°C17.9°C | 17.9°C | 57 | 7.2 | 11.211 h |
| December | 21.0°C14.1°C | 14.1°C | 33 | 6.6 | 10.911 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
January in nearby cities
- Tây Hồ in JanuaryVietnam · 6 kmHigh 19.4°C · Low 13.5°C · 40 mm rain
- Long Bien in JanuaryVietnam · 6 kmHigh 19.7°C · Low 13.6°C · 37 mm rain
- Bắc Từ Liêm in JanuaryVietnam · 11 kmHigh 19.4°C · Low 13.6°C · 40 mm rain
- Thuận Thanh in JanuaryVietnam · 25 kmHigh 19.7°C · Low 13.5°C · 37 mm rain
- Sóc Sơn in JanuaryVietnam · 26 kmHigh 19.3°C · Low 13.4°C · 43 mm rain
- Phúc Yên in JanuaryVietnam · 28 kmHigh 19.2°C · Low 13.5°C · 43 mm rain
- Mỹ Hào in JanuaryVietnam · 28 kmHigh 19.9°C · Low 13.7°C · 37 mm rain
- Bắc Ninh in JanuaryVietnam · 30 kmHigh 19.6°C · Low 13.3°C · 37 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Hanoi) is explained once on the Hanoi year overview and on the Sources, method and limits page.
Bắc Từ Liêm and Tây Hồ lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.