Koh Samui vs Penang

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Koh Samui edges ahead as the better destination in March. Koh Samui offers 11 hours of daily sunshine with only 10 rain days, while Penang sees 10 sunshine hours and 23 rain days.

Koh Samui sits in the comfortable travel range at 26°C. Penang runs hot at 30°C.

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

Koh Samui reaches an average high of 26°C (79°F) and drops to 24°C (75°F) at night during March. The daily temperature range is 2°C, meaning relatively stable temperatures from day to night.

Penang averages 30°C (86°F) for the high and 25°C (77°F) for the low, with a daily range of 5°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 March.

Koh Samui receives approximately 89 mm of rainfall across 10 rain days during March. You can expect rain roughly every other day.

Penang sees 182 mm over 23 rain days. That makes Koh Samui the drier option by 13 rain days and 93 mm of total precipitation.

Both cities share similar humidity levels at 82%.