Bangkok vs Koh Samui

Bangkok and Koh Samui are closely matched in December. Neither city has a clear advantage across all metrics. Your decision should come down to personal preference, cultural interests, and travel logistics rather than weather alone.

Bangkok sits in the comfortable travel range at 28°C. Koh Samui is also comfortable at 28°C.

For travelers who prioritize dry weather, both cities are equally dry in December.

Bangkok reaches an average high of 28°C (82°F) and drops to 21°C (70°F) at night during December. The daily temperature range is 7°C, meaning relatively stable temperatures from day to night.

Koh Samui averages 28°C (82°F) for the high and 21°C (70°F) for the low, with a daily range of 7°C. The two cities feel quite similar in terms of temperature.

Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in December.

Bangkok receives approximately 70 mm of rainfall across 6 rain days during December. Rain is occasional, so a light rain jacket should suffice.

Koh Samui sees 70 mm over 6 rain days. Both cities are equally rainy this month.

Both cities share similar humidity levels at 82%.