Thailand in December: where is it warmest?
In December, Bangkok is the warmest place with 31 °C by day, Ko Pha-ngan the coolest with 25 °C. 12 of 12 destinations have good holiday weather.
All destinations in December, warmest first
Long-term averages for the month: daytime high, sea, sunshine and rainy days.
| Place | Score | Air | Sea | Sun | Rain days |
|---|---|---|---|---|---|
| Bangkok | 71 | 31° | – | 7 h | 2 |
| Pattaya | 93 | 30° | 28° | 7 h | 3 |
| Hua Hin | 92 | 29° | 28° | 7 h | 2 |
| Khao Lak | 75 | 29° | 29° | 6 h | 14 |
| Koh Lanta | 74 | 29° | 29° | 5 h | 13 |
| Ao Nang, Krabi | 73 | 29° | 29° | 5 h | 14 |
| Patong, Phuket | 75 | 28° | 29° | 6 h | 14 |
| Phuket | 75 | 28° | 29° | 6 h | 14 |
| Koh Samui | 71 | 28° | 28° | 6 h | 17 |
| Chiang Mai | 93 | 27° | – | 8 h | 1 |
| Koh Tao | 81 | 27° | 28° | 6 h | 11 |
| Ko Pha-ngan | 76 | 25° | 28° | 6 h | 13 |
Thailand in December: quick answers
Thailand in December: where is it warmest?
The warmest places in December are Bangkok (31 °C), Pattaya (30 °C) and Hua Hin (29 °C).
Thailand in December: where is the sea warmest?
The sea is warmest at Khao Lak (29 °C), Koh Lanta (29 °C) and Ao Nang, Krabi (29 °C).
Thailand in December: where is the weather best?
The best holiday weather in December – warm, sunny and dry – is in Pattaya, Chiang Mai and Hua Hin.
Thailand month by month
Thailand: weather & best time to visit
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences