Vietnam Ha Long Bay Weather in December (cool dry · holiday season) — Climate Guide
December (cool dry · holiday season) in Ha Long Bay is Cool + festive
Ha Long Bay Weather in December (cool dry · holiday season) — Quick Answer
As of 2026- Avg temp
- 21° / 15°
- Rainfall
- 25mm · 6 days
- Crowds
- Moderate
As of 2026, Ha Long Bay in December (cool dry · holiday season) averages a high of 21°C and low of 15°C with 25mm of rain over about 6 days. Light jacket + sweater + warm layer for cruise mornings. Long pants + light scarf.
December (cool dry · holiday season) is Cool + festive for Ha Long Bay.
Cool dry — 15/21°C. Foggy mornings clearing midday. Christmas + NYE bring Western tourist spike + holiday cruise menus. Photography variable. Best for travelers wanting Christmas atmosphere + low daytime crowds.
Travel score
Ha Long Bay December (cool dry · holiday season) Weather Stats
Avg High
21°C
Avg Low
15°C
Rainy Days
6
25mm total
Sunshine
5h
Daily avg
Humidity
77%
Cool + dry
UV Index
4
Moderate
Wind
9 km/h
Gusts 17
Sea Temp
20°C
Too cool to swim
Crowds
Moderate
At attractions
December (cool dry · holiday season) Sunrise & Sunset
Air Quality
PM2.5
35 μg/m³
PM10
58 μg/m³
Status
Moderate
Feels-Like Temperature & Wind
Feels like
Daytime
20°C
Nighttime
14°C
Humidity and wind affect how the actual temperature feels.
Wind
9 km/h
Max gust 17 km/h
Activities Recommended for December (cool dry · holiday season)
December (cool dry · holiday season) Travel Pros & Cons
Pros
- Cool comfortable temperatures
- Holiday cruise themed dinners
- Hanoi Christmas + NYE atmosphere
Cons
- Foggy mornings
- Cool water
- NYE briefly spikes prices
December (cool dry · holiday season) Events & Festivals
- Christmas + New Year (December 25 + 31)
Ha Long Bay in December (cool dry · holiday season) — Full Picture
Cool dry — 15/21°C. Foggy mornings clearing midday. Christmas + NYE bring Western tourist spike + holiday cruise menus. Photography variable. Best for travelers wanting Christmas atmosphere + low daytime crowds.
What to Wear & What to Pack
Light jacket + sweater + warm layer for cruise mornings. Long pants + light scarf.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
26°C
19.7°C
12.3/mo
Summer (Jun·Jul·Aug)
31.7°C
26°C
16.7/mo
Autumn (Sep·Oct·Nov)
27°C
21.7°C
9.3/mo
Winter (Dec·Jan·Feb)
Current20°C
14°C
8/mo
Ha Long Bay Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 19° | 13° | 8d·25mm | 4h | 78% | 4 | Moderate | Shoulder | |
| 20° | 14° | 10d·30mm | 3h | 80% | 4 | Moderate | Shoulder | |
| 22° | 16° | 11d·35mm | 4h | 82% | 5 | Busy | Peak | |
| 26° | 20° | 12d·60mm | 5h | 84% | 7 | Very busy | Peak | |
| 30° | 23° | 14d·175mm | 6h | 84% | 9 | Moderate | Shoulder | |
| 32° | 26° | 15d·250mm | 6h | 84% | 10 | Quiet | Low season | |
| 32° | 26° | 17d·290mm | 6h | 84% | 10 | Quiet | Low season | |
| 31° | 26° | 18d·320mm | 5h | 85% | 9 | Quiet | Low season | |
| 30° | 24° | 14d·240mm | 6h | 82% | 8 | Quiet | Low season | |
| 27° | 22° | 8d·100mm | 6h | 76% | 7 | Very busy | Peak | |
| 24° | 19° | 6d·50mm | 6h | 75% | 5 | Busy | Peak | |
| 21° | 15° | 6d·25mm | 5h | 77% | 4 | Moderate | Peak |
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Ha Long Bay December (cool dry · holiday season) Hotel Picks
Frequently Asked Questions
Is December (cool dry · holiday season) a good time to visit Ha Long Bay?
Ha Long Bay in December (cool dry · holiday season) is Cool + festive. Tourist crowds are moderate and flight/hotel prices are peak.
What's the average temperature in Ha Long Bay in December (cool dry · holiday season)?
Ha Long Bay December (cool dry · holiday season) averages a high of 21°C and a low of 15°C.
Does it rain much in Ha Long Bay in December (cool dry · holiday season)?
Ha Long Bay December (cool dry · holiday season) averages 25mm of rainfall over about 6 rainy days.
What should I wear in Ha Long Bay in December (cool dry · holiday season)?
Light jacket + sweater + warm layer for cruise mornings. Long pants + light scarf.
What time are sunrise and sunset in Ha Long Bay in December (cool dry · holiday season)?
Ha Long Bay December (cool dry · holiday season) sunrise is 06:25 and sunset is 17:15, with 10h 50min of daylight.
What's the air quality like in Ha Long Bay in December (cool dry · holiday season)?
Ha Long Bay December (cool dry · holiday season) air quality (AQI) averages 75, rated Moderate. PM2.5 averages 35μg/m³.
What activities are recommended in Ha Long Bay in December (cool dry · holiday season)?
In December (cool dry · holiday season), Ha Long Bay is great for Cruise (mist-clear days), Hanoi Christmas walks, NYE on cruise.
Is December (cool dry · holiday season) peak season in Ha Long Bay?
Ha Long Bay December (cool dry · holiday season) crowds are moderate and prices are peak. You can travel relatively comfortably without long queues.
Best Months to Visit Ha Long Bay
View Other Months
Planning a December (cool dry · holiday season) trip to Ha Long Bay?
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Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.