Bangkok
Thailand
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Bangkok, Thailand

A beautiful park in spring outside the Wat Ratchanatdaram Temple in the heart of Bangkok, Thailand
A beautiful park in spring outside the Wat Ratchanatdaram Temple in the heart of Bangkok, Thailand
December is the coldest, rather mildest, month in Bangkok with an average low temperature of 21.7°C (71.1°F). The daily high temperatures are 31.7°C (89.1°F), but the humidity is at the lowest level, 66%, of the year, which reduces the stickiness of the heat.
The winter is mostly dry, and the rainfall is almost absent. Daily sunshine is 9 hours, while the daylight extends to 11 hours.
Bangkok witnesses its peak tourist season throughout December, and the weather conditions make it one of the best times to visit the city. For locals, it is almost winter weather in December, while for tourists, the weather is rarely cooler.
  • Average high temperature in December: 31.7°C

The warmest month (with the highest average high temperature) is April (35.4°C).
The month with the lowest average high temperature is December (31.7°C).

  • Average low temperature in December: 22°C

The month with the highest average low temperature is April (26.9°C).
The coldest month (with the lowest average low temperature) is December (22°C).

  • Average humidity in December: 66%

The month with the highest relative humidity is September (79%).
The month with the lowest relative humidity is December (66%).

  • Average rainfall in December: 6.3mm

The wettest month (with the highest rainfall) is September (334.3mm).
The driest month (with the lowest rainfall) is December (6.3mm).

  • Average rainfall days in December: 1 days

The month with the highest number of rainy days is September (21 days).
Months with the lowest number of rainy days are January and December (1 days).

  • Average sea temperature in December: 27.9°C

The best month for swimming (with the highest average sea temperature) is May (29.9°C).
The coldest month (with the lowest average sea temperature) is January (26.7°C).

  • Average daylight in December: 11.3h

The month with the longest days is June (Average daylight: 12.9h).
The month with shortest days is December (Average daylight: 11.3h).

  • Average sunshine in December: 8.5h

The month with most sunshine is February (Average sunshine: 9h).
Months with least sunshine are August and September (Average sunshine: 5.2).

  • Average UV index in December: 9

Months with the highest UV index are February, March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 9).

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