Monthly climate guide
Hạ Long weather in December
With highs near 21°C (69°F) and lows around 13°C (55°F), December feels mild in Hạ Long. Rainfall averages about 31 mm (fairly dry) and the sky is often cloudy. Daytime highs are 5°C cooler than November and about the same as January.
What stands out in December
- Only one month is cooler in Hạ Long than December.
- Just 370 km apart, but Hạ Long runs about 2°C warmer than Sa Pa this month.
- It's one of the drier stretches of the year in Hạ Long.
- Rain is well below Hạ Long's usual level (around 80% less).
Avg high
21°C
69°F
Avg low
13°C
55°F
Rainfall
31 mm
fairly dry
Humidity
77%
relative
Sky
70%
cloud · often cloudy
Hạ Long weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 20°C / 67°F | 12°C / 54°F | 51 mm | 82% | 79% |
| February | 22°C / 71°F | 14°C / 57°F | 27 mm | 82% | 84% |
| March | 24°C / 76°F | 17°C / 63°F | 59 mm | 85% | 85% |
| April | 28°C / 82°F | 21°C / 69°F | 77 mm | 85% | 76% |
| May | 30°C / 86°F | 25°C / 76°F | 162 mm | 86% | 74% |
| June | 31°C / 87°F | 27°C / 80°F | 221 mm | 86% | 83% |
| July | 31°C / 87°F | 27°C / 80°F | 343 mm | 86% | 83% |
| August | 30°C / 87°F | 26°C / 79°F | 391 mm | 86% | 82% |
| September | 30°C / 86°F | 25°C / 77°F | 257 mm | 84% | 71% |
| October | 28°C / 82°F | 22°C / 71°F | 168 mm | 82% | 59% |
| November | 25°C / 77°F | 18°C / 65°F | 57 mm | 83% | 63% |
| December | 21°C / 69°F | 13°C / 55°F | 31 mm | 77% | 70% |
What to pack for December
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
Is December a good time to visit Hạ Long?
Compare the months in the chart above to find your ideal window.
Best time to visit Hạ Long →Other Vietnam cities in December
Cite or embed this data
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Hạ Long weather in December. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/vietnam/ha-long/december
<a href="https://weathercompare.eu/weather/vietnam/ha-long/december">Hạ Long weather in December</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/vietnam/ha-long" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Hạ Long weather in December"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/vietnam/ha-long/december">Hạ Long weather in December</a> – WeatherCompare</p>
Hạ Long in December: quick answers
Is December a good time to visit Hạ Long?
Yes. December is one of the best months for Hạ Long, with highs around 21°C and about 31 mm of rain.
How warm is Hạ Long in December?
Average highs are about 21°C (69°F) and average lows about 13°C (55°F), based on 10 years of daily data.
Does it rain a lot in Hạ Long in December?
Hạ Long typically gets around 31 mm of rain in December — fairly dry.
Figures are long-term averages for the area around Hạ Long (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.