Penang vs Koh Samui

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Koh Samui edges ahead as the better destination in July. Koh Samui offers 10 hours of daily sunshine with only 18 rain days, while Penang sees 10 sunshine hours and 21 rain days.

Penang can feel quite hot at 30°C, so plan for heat. Koh Samui is also comfortable at 27°C.

For travelers who prioritize dry weather, Koh Samui is the stronger choice in July.

Penang reaches an average high of 30°C (86°F) and drops to 25°C (77°F) at night during July. The daily temperature range is 5°C, meaning relatively stable temperatures from day to night.

Koh Samui averages 27°C (81°F) for the high and 24°C (75°F) for the low, with a daily range of 3°C. The 3°C difference is noticeable but not dramatic.

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

Penang receives approximately 157 mm of rainfall across 21 rain days during July. Rain is frequent, so waterproof gear is essential.

Koh Samui sees 82 mm over 18 rain days. That makes Koh Samui the drier option by 3 rain days and 75 mm of total precipitation.

Both cities share similar humidity levels at 82%.