What the weather is like in December
December is dry across most of Thailand. Andaman beaches in peak season. Koh Samui drying out fast. Bangkok cool (23°C low) and very dry. Christmas/New Year sees a sharp price spike, especially in beach destinations.
Averages are five-year Open-Meteo (ERA5) figures for Bangkok; other parts of Thailand vary. Full sources below.
What to pack for Thailand in December
- Lightweight, breathable clothing
- Sun hat & high-SPF sunscreen
- Swimwear
What's on in December
- Full Moon Party (Koh Phangan) (Haad Rin, Koh Phangan) — Monthly all-night beach party on the November-monsoon-immune Gulf side. Major draw for partying backpackers. Dates shift with lunar cycle — check ahead.
Is December the right month?
Thailand's best month is January; the toughest is September. See the full month-by-month breakdown for Thailand.
Where to stay in December
December is peak season in Thailand, so prices are at their highest. Book early for the best choice of rooms.
- Bangkok (Sukhumvit / Silom)$$Capital arrival, food, transit hub
Sukhumvit (Asoke, Phrom Phong) for sky-train access + nightlife. Silom for business + Lumpini Park. Khao San Road for backpackers and Songkran chaos.
See Bangkok (Sukhumvit / Silom) hotels for 12–18 Dec 2026 - Chiang Mai (Old City)$$Northern culture, temples, food
Old City inside the moat for walking access to temples. Nimman for cafes + cooking schools. Avoid March–April for burning-season haze.
See Chiang Mai (Old City) hotels for 12–18 Dec 2026 - Andaman beaches (Phuket / Krabi)$$Beach trips Nov–Apr
Phuket has more flight options + nightlife (Patong) but more developed. Krabi (Ao Nang, Railay) is quieter with better scenery. See our Krabi best-time guide.
See Andaman beaches (Phuket / Krabi) hotels for 12–18 Dec 2026 - Gulf coast (Koh Samui / Koh Phangan)$$Beach trips May–Oct (opposite monsoon)
Koh Samui (Bophut, Chaweng) for boutique resorts. Koh Phangan for Full Moon Party + yoga. See our Koh Samui best-time guide.
See Gulf coast (Koh Samui / Koh Phangan) hotels for 12–18 Dec 2026
Links open a hotel search for 12–18 Dec 2026; you can change the dates there. We may earn a commission, at no extra cost to you.
Frequently asked questions
Is December a good time to visit Thailand?
December scores 76/100 on the Atlas Ranger Score — "Great" — which blends weather with crowds and price. December is one of the best months to visit Thailand — strong conditions and the reason many travellers pick this window.
How warm is Thailand in December?
Expect daytime highs around 32°C (90°F) and overnight lows near 23°C (73°F), with about 10.4 hours of sun a day.
Does it rain in Thailand in December?
December sees roughly 14mm of rain — relatively dry.
What should I pack for Thailand in December?
For December, pack: Lightweight, breathable clothing; Sun hat & high-SPF sunscreen; Swimwear.
Sources
Every claim on this page is backed by an authoritative source. Atlas Ranger synthesizes data from multiple references so you can see exactly where each fact came from.
- Tourism Authority of Thailand (TAT)Used for: Official tourism guidance, festival timing, regional travel intel
- Open-Meteo Historical Climate Data (ERA5)Used for: Monthly temperature, rainfall, sunshine averages (2020–2024) — Bangkok as national proxy
- U.S. State Department Thailand Travel AdvisoryUsed for: Independent safety assessment + entry requirement reference
- Thai Meteorological Department (TMD)Used for: Thailand's national meteorological service — monsoon timing per region
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