In July, Ko Samui typically sees daytime highs of 30.9°C and overnight lows around 24.4°C. Compared to the annual average high of 30.3°C, July runs +0.6°C.
July in Ko Samui averages a daytime high of 30.9°C and an overnight low of 24.4°C.
July runs +0.6°C compared to Ko Samui's annual average high of 30.3°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 30.9°C and cooler evenings around 24.4°C.