Thailand Chiang Mai Weather in December — Climate Guide
December in Chiang Mai is very-high
December is very-high for Chiang Mai.
Peak month — cool dry. Christmas + NYE surge. Highland cool 15°C lows perfect.
Travel score
Chiang Mai December Weather Stats
Avg High
28°C
Avg Low
15°C
Rainy Days
2
15mm total
Sunshine
8h
Daily avg
Humidity
65%
moderate
UV Index
7
High
Wind
6 km/h
Gusts 15
Sea Temp
0°C
no swimming
Crowds
Very busy
At attractions
December Sunrise & Sunset
Air Quality
PM2.5
25 μg/m³
PM10
45 μg/m³
Status
moderate
Feels-Like Temperature & Wind
Feels like
Daytime
27°C
Nighttime
14°C
Humidity and wind affect how the actual temperature feels.
Wind
6 km/h
Max gust 15 km/h
Activities Recommended for December
December Travel Pros & Cons
Pros
- 28/15°C ideal
- Clear skies
- Christmas + NYE festive
- Doi Suthep visibility peak
Cons
- Hotels peak Christmas/NYE
- Tourist crush
December Events & Festivals
- Christmas + New Year
- Highland cool peak
Chiang Mai in December — Full Picture
Peak month — cool dry. Christmas + NYE surge. Highland cool 15°C lows perfect.
What to Wear & What to Pack
Cool dry. T-shirt + light sweater + jacket morning.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
34.7°C
22°C
6.3/mo
Summer (Jun·Jul·Aug)
32°C
23°C
14.3/mo
Autumn (Sep·Oct·Nov)
30.3°C
21°C
11.3/mo
Winter (Dec·Jan·Feb)
Current29°C
15.7°C
2/mo
Chiang Mai Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| January (Best) | 28° | 15° | 2d·10mm | 8h | 65% | 7 | Very busy | Peak |
| February (Best) | 31° | 17° | 2d·10mm | 9h | 60% | 8 | Very busy | Peak |
| 34° | 20° | 3d·25mm | 9h | 60% | 10 | Busy | Shoulder | |
| 36° | 23° | 5d·50mm | 8h | 65% | 11 | Busy | Peak | |
| 34° | 23° | 11d·150mm | 7h | 75% | 11 | Quiet | Low season | |
| 32° | 23° | 13d·130mm | 6h | 80% | 10 | Quiet | Low season | |
| 32° | 23° | 14d·150mm | 6h | 80% | 10 | Moderate | Shoulder | |
| 32° | 23° | 16d·175mm | 6h | 82% | 9 | Moderate | Shoulder | |
| 32° | 23° | 17d·200mm | 6h | 82% | 8 | Quiet | Low season | |
| 30° | 22° | 12d·130mm | 7h | 80% | 8 | Moderate | Shoulder | |
| November (Best) | 29° | 18° | 5d·50mm | 8h | 70% | 7 | Very busy | Peak |
| December (Best) | 28° | 15° | 2d·15mm | 8h | 65% | 7 | Very busy | Peak |
View Other Months
Chiang Mai December Hotel Picks
Frequently Asked Questions
Is December a good time to visit Chiang Mai?
Chiang Mai in December is very-high. Tourist crowds are very busy and flight/hotel prices are peak.
What's the average temperature in Chiang Mai in December?
Chiang Mai December averages a high of 28°C and a low of 15°C.
Does it rain much in Chiang Mai in December?
Chiang Mai December averages 15mm of rainfall over about 2 rainy days.
What should I wear in Chiang Mai in December?
Cool dry. T-shirt + light sweater + jacket morning.
What time are sunrise and sunset in Chiang Mai in December?
Chiang Mai December sunrise is 06:40 and sunset is 17:45, with 11h 5min of daylight.
What's the air quality like in Chiang Mai in December?
Chiang Mai December air quality (AQI) averages 60, rated Moderate. PM2.5 averages 25μg/m³.
What activities are recommended in Chiang Mai in December?
In December, Chiang Mai is great for Doi Suthep sunrise, Old City temples, Elephant Park.
Is December peak season in Chiang Mai?
Chiang Mai December crowds are very busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Chiang Mai
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.