Weather in Koh Samui 🇹🇭

Monthly weather averages & travel planning

Avg Temp

25°C

Rain Days

11 days

Sun Hours

11 hrs

Humidity

82%

Koh Samui Weather Guide

Complete monthly climate data for Koh Samui, 🇹🇭 Thailand

January

25°/23°C

11 rain days, 11h sun

February

25°/23°C

6 rain days, 11h sun

March

26°/24°C

10 rain days, 11h sun

April

27°/24°C

12 rain days, 11h sun

May

27°/24°C

22 rain days, 11h sun

June

27°/24°C

19 rain days, 10h sun

July

27°/24°C

18 rain days, 10h sun

August

27°/24°C

18 rain days, 10h sun

September

26°/23°C

22 rain days, 9h sun

October

25°/23°C

26 rain days, 9h sun

November

25°/23°C

22 rain days, 9h sun

December

25°/23°C

14 rain days, 10h sun

Year-Round Climate

All temperatures in °C

Month	High	Low	Rain Days	Sun	Details
January	25°C	23°C	11	11h	View
February	25°C	23°C	6	11h	View
March	26°C	24°C	10	11h	View
April	27°C	24°C	12	11h	View
May	27°C	24°C	22	11h	View
June	27°C	24°C	19	10h	View
July	27°C	24°C	18	10h	View
August	27°C	24°C	18	10h	View
September	26°C	23°C	22	9h	View
October	25°C	23°C	26	9h	View
November	25°C	23°C	22	9h	View
December	25°C	23°C	14	10h	View