Koh Samui vs Bangkok

Koh Samui and Bangkok are closely matched in October. 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.

Koh Samui sits in the comfortable travel range at 25°C. Bangkok runs hot at 30°C.

For travelers who prioritize dry weather, Bangkok is the stronger choice in October.

Koh Samui reaches an average high of 25°C (77°F) and drops to 23°C (73°F) at night during October. The daily temperature range is 2°C, meaning relatively stable temperatures from day to night.

Bangkok averages 30°C (86°F) for the high and 24°C (75°F) for the low, with a daily range of 6°C. There is a notable 5°C gap between the two cities, so expect a very different feel.

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

Koh Samui receives approximately 282 mm of rainfall across 26 rain days during October. Rain is frequent, so waterproof gear is essential.

Bangkok sees 194 mm over 21 rain days. That makes Bangkok the drier option by 5 rain days and 88 mm of total precipitation.

Both cities share similar humidity levels at 82%.