Penang vs Koh Samui

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Koh Samui edges ahead as the better destination in January. Koh Samui offers 11 hours of daily sunshine with only 11 rain days, while Penang sees 10 sunshine hours and 15 rain days.

Penang can feel quite hot at 29°C, so plan for heat. Koh Samui is also comfortable at 25°C.

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

Penang reaches an average high of 29°C (84°F) and drops to 24°C (75°F) at night during January. The daily temperature range is 5°C, meaning relatively stable temperatures from day to night.

Koh Samui averages 25°C (77°F) for the high and 23°C (73°F) for the low, with a daily range of 2°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 January.

Penang receives approximately 114 mm of rainfall across 15 rain days during January. Rain is frequent, so waterproof gear is essential.

Koh Samui sees 81 mm over 11 rain days. That makes Koh Samui the drier option by 4 rain days and 33 mm of total precipitation.

Both cities share similar humidity levels at 82%.