December · Thailand
Best time to visit Koh Tao in December Weather, crowds & prices
Weather in Koh Tao in December
Average temperature 28°C, 240 mm of rain, about 15 days with 6+ hours of sunshine and 78% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
December score
5.8/10
Ranked #11 of 12 months
- Avg temp
- 28°C
- Rainfall
- 240 mm
- Humidity
- 78%
- Days with 6h+ sun
- 15
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $$ · Moderate Cost ($$)
December in Koh Tao scores 5.8/10 for beach and coastal travel - ranked #11 of 12. Expect around 28°C, 240 mm of rain, and roughly 15 days with 6+ hours of sunshine this month.
Ko Tao is Thailand's dive-cert island-compact coves, training reefs, and a backpacker nightlife pocket in Mae Haad. Best window: the drier months outside peak monsoon.
December in Koh Tao — workable with trade-offs
Days in December average 28°C (82°F) and humidity near 78% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
Expect monsoon-level rainfall at 240 mm: only about 15 days with 6+ hours of sunshine across the month, and stretches of heavy rain are normal.
That is 5.8/10 on the same scale — 11th of 12 months, versus 9.2/10 for the best month here.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Budget for mid-season pricing, and crowds are light for this destination.
If your dates are flexible, March is materially better in Koh Tao — 3.4 points higher on the same scale.
Frequently asked
- What is the weather like in Koh Tao in December?
- In December, Koh Tao averages 28°C, 240 mm of rain, and about 15 days with 6+ hours of sunshine. Its climate-comfort score is 5.8/10.
- Is December a good time to visit Koh Tao?
- December earns a 5.8/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Koh Tao in December?
- Expect about 240 mm of rain in December. Average humidity is 78% and there are about 15 days with 6+ hours of sunshine.
Curated in Koh Tao
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Things to do in Koh Tao
Koh Tao, Thailand. Live activities and tours from GetYourGuide, matched to this destination.