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Koh Samui in December

Thailand

Koh Samui in December

30° / 24°Rainy days 20

Cheapest flights to Koh Samui in December

  • From TorontoThu, Dec 31 → Thu, Jan 7 · round trip$2,173Book
  • From SingaporeSat, Dec 5 → Sun, Dec 13 · round trip$303Book

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Good-value Koh Samui hotels in December

See hotels on Trip.com

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eSIMeSIM for ThailandData the moment you landKlook eSIMeSIM guide →Airalo ↗

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Koh Samui weather in December

High / Low

30° / 24°

Rain

373 mm

Rainy days

20 / 30

Index · #7/12

42/100

Koh Samui in December ranks #7 of 12 months for comfort: highs around 30°C, lows 24°C, and about 20 rainy days. Compared with November, highs change by 0°C and rainy days by -7.

Compared with the months around it

MonthHigh / LowRainy daysIndex
November30° / 24°2742
December30° / 24°2042
January29° / 24°1453

Top tours & tickets in Koh Samui

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Public holidays · December 2026

  • 12/05King Bhumibol's Birthday / Father's Day
  • 12/10Constitution Day
  • 12/31New Year's Eve

Month

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Flights & hotels on HopeGoo

Asia-focused flights, hotels, trains and attraction tickets.

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