Koh Samui vs Penang

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Koh Samui edges ahead as the better destination in October. Koh Samui offers 9 hours of daily sunshine with only 26 rain days, while Penang sees 8 sunshine hours and 29 rain days.

Koh Samui sits in the comfortable travel range at 25°C. Penang runs hot at 29°C.

For travelers who prioritize dry weather, Koh Samui is the stronger choice in October. Koh Samui receives 1 more hour of sunshine per day, which matters for sightseeing and outdoor activities.

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.

Penang averages 29°C (84°F) for the high and 25°C (77°F) for the low, with a daily range of 4°C. The 4°C difference is noticeable but not dramatic.

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.

Penang sees 337 mm over 29 rain days. That makes Koh Samui the drier option by 3 rain days and 55 mm of total precipitation.

Both cities share similar humidity levels at 82%.