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
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 |
View Other Months
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
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.