Koh Samui vs Bangkok

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 Bangkok sees 9 sunshine hours and 23 rain days.

Koh Samui sits in the comfortable travel range at 27°C. Bangkok runs hot at 32°C.

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

Koh Samui reaches an average high of 27°C (81°F) and drops to 24°C (75°F) at night during July. The daily temperature range is 3°C, meaning relatively stable temperatures from day to night.

Bangkok averages 32°C (90°F) for the high and 26°C (79°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 July.

Koh Samui receives approximately 82 mm of rainfall across 18 rain days during July. Rain is frequent, so waterproof gear is essential.

Bangkok sees 138 mm over 23 rain days. That makes Koh Samui the drier option by 5 rain days and 56 mm of total precipitation.

Both cities share similar humidity levels at 82%.