
Thailand
Koh Samui in December
Cheapest flights to Koh Samui in December
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Good-value Koh Samui hotels in December
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Koh Samui weather in December
30° / 24°
373 mm
20 / 30
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
| Month | High / Low | Rainy days | Index |
|---|---|---|---|
| November | 30° / 24° | 27 | 42 |
| December | 30° / 24° | 20 | 42 |
| January | 29° / 24° | 14 | 53 |
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









