Climate averages 1991–2020
Hạ Long weather
in December.
A mild, fairly dry month: the 10th warmest and the 2nd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a mild month in Hạ Long: daytime highs average 20.8°C and nights cool to about 15.8°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 31 mm of rain on roughly 6 days, which makes December a fairly dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 53 min on an average December day.
The nearest other city in this atlas is Cẩm Phả (22 km away). In December its highs average 20.3°C, 0.5°C cooler than Hạ Long, with 48 mm of rain.
Among the 136 cities listed in Vietnam, Hạ Long ranks joint 114th of 136 for the warmest December highs and joint 18th of 136 for the driest December (rainfall, lowest first). The mean December high of those 136 cities is 25.0°C; Hạ Long is 4.3°C cooler than that mean.
From December to January, average highs fall by 1.6°C to 19.1°C, and monthly rainfall rises from 31 mm to 34 mm.
The annual picture
December 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
Hạ Long climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 19.1°C14.6°C | 14.6°C | 34 | 6.4 | 11.011 h |
| February | 20.5°C15.8°C | 15.8°C | 21 | 5.7 | 11.411 h |
| March | 23.2°C18.5°C | 18.5°C | 43 | 8.8 | 12.012 h |
| April | 26.7°C21.8°C | 21.8°C | 69 | 11.6 | 12.613 h |
| May | 29.3°C24.8°C | 24.8°C | 219 | 19.5 | 13.113 h |
| June | 30.8°C26.8°C | 26.8°C | 266 | 22.4 | 13.413 h |
| July | 30.7°C26.8°C | 26.8°C | 305 | 24.3 | 13.313 h |
| August | 30.4°C26.1°C | 26.1°C | 381 | 26.2 | 12.813 h |
| September | 29.6°C25.0°C | 25.0°C | 243 | 20.0 | 12.312 h |
| October | 27.8°C22.9°C | 22.9°C | 104 | 11.9 | 11.712 h |
| November | 24.8°C19.6°C | 19.6°C | 51 | 8.2 | 11.211 h |
| December, selected | 20.8°C15.8°C | 15.8°C | 31 | 5.9 | 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
December in nearby cities
- Cẩm Phả in DecemberVietnam · 22 kmHigh 20.3°C · Low 15.9°C · 48 mm rain
- Haiphong in DecemberVietnam · 42 kmHigh 21.1°C · Low 14.7°C · 37 mm rain
- Kiến An in DecemberVietnam · 49 kmHigh 21.0°C · Low 15.2°C · 37 mm rain
- Thị Trấn Mạo Khê in DecemberVietnam · 51 kmHigh 21.3°C · Low 14.0°C · 31 mm rain
- Thị Trấn Đông Triều in DecemberVietnam · 60 kmHigh 21.2°C · Low 13.9°C · 31 mm rain
- Chũ in DecemberVietnam · 71 kmHigh 20.5°C · Low 12.9°C · 34 mm rain
- Hải Dương in DecemberVietnam · 77 kmHigh 21.2°C · Low 14.3°C · 33 mm rain
- Chí Linh in DecemberVietnam · 80 kmHigh 21.1°C · Low 14.0°C · 33 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 Hạ Long) is explained once on the Hạ Long year overview and on the Sources, method and limits page.