Bangkok
Thailand
Long-term weather forecast
Long-term weather forecast
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December weather forecast and Climate
Bangkok, Thailand

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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 of 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.
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  • The 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).

  • The 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).

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  • The 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%).

  • The 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).

  • The 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).

  • The 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).

  • The average daylight in December: 11h

Months with the longest days are May, June, July and August (Average daylight: 13h).
Months with shortest days are January, November and December (Average daylight: 11h).

  • The 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).

  • The 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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