Ko Samui Weather in December

What's the weather like in Ko Samui, Thailand in December 2018?

The climate in Ko Samui during December can be summarized as hot, humid and wet.

December is in the winter in Ko Samui and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a steamy 29°C (83°F), whilst at night 22°C (72°F) is normal.

Ko Samui weather averages (imperial / metric)
Daytime temperature 28.5°C 83.3°F
Nightly temperature 22.3°C 72.1°F
Average temperature 25.4°C 77.7°F
Daily sunshine 7 hrs
Avg rainfall 188 mm 7.4 ins
Rainy days 13 days
Sea temperature 28.3°C 83°F
Humidity 80%
Windspeed 9.4kph 6 mph

On average December is the 3rd wettest month of the year in Ko Samui with around 188mm 7.4 inches of rain making it a wet time to visit. This rainfall is typically spread over 13 days, although this may vary considerably.

On the flip side this corresponds to an average of 7 hours of sunshine per day.

December temperatures in Ko Samui

December rainfall

December hourly sunshine

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in December 2018.

Other monthly averages

Ko Samui weather stats

Ko Samui weather statistics
Hottest month: April 31.6°C 88.9°F
Driest month: February 39mm 1.5ins
Sunniest month: February 8.7hrs
Coldest month: January 28.4°C 83.1°F
Wettest month: November 463mm 18.2ins
Map showing location of Ko Samui (9.53567, 99.93567)

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