Wiang Sa Weather in December
What's the weather like in Wiang Sa (Surat Thani) in December 2025?
The climate in Wiang Sa during December can be summarized as hot, humid and very wet.
December is in the winter in Wiang Sa and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a steamy 29°C (85°F), whilst at night 22°C (71°F) is normal.
| Daytime temperature | 29.4°C 84.8°F |
|---|---|
| Nightly temperature | 21.7°C 71°F |
| Average temperature | 25.5°C 77.9°F |
| Daily sunshine | 6.9 hrs |
| Avg rainfall | 210 mm 8.3 ins |
| Rainy days | 14 days |
| Sea temperature | 28.4°C 83.2°F |
| Humidity | 82% |
| Windspeed | 6.5kph 4 mph |
On average December is the 5th wettest month of the year in Wiang Sa with around 210mm 8.3 inches of rain making it a very wet time to visit. This rainfall is typically spread over 14 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.9 hours of sunshine per day.
December temperatures in Wiang Sa
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 Wiang Sa in December 2025.
Other monthly averages
Best places to visit in December
Wiang Sa weather stats
| Hottest month: | April | 33.4°C 92.1°F |
|---|---|---|
| Driest month: | February | 25mm 1ins |
| Sunniest month: | February | 9.3hrs |
| Coldest month: | January | 29.9°C 85.8°F |
| Wettest month: | November | 403mm 15.9ins |
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