The average temperature in December is between 3°C and 16°C.
During the day, it is recommended to wear warm clothes such as suits, jackets, windbreakers, casual wear, jackets, suits, and thin sweaters.
At night, it is recommended to wear windbreakers, thick coats, wool suits, winter clothes and other warm clothes.
Average temperatures in various regions of Bhutan in December 2019
| Values.in.Celsius | Paro | Thimphu | Punakha | Trongsa | Bumthang | Mongar | Trashigang |
| Max | 11.2 | 14.5 | 19.1 | 18.2 | 12.3 | 17.7 | 23.0 |
| Min | -1.7 | -1.1 | 6.3 | 2.5 | -2.3 | 9.5 | 11.6 |
Average temperatures in various regions of Bhutan in December 2018
| Values.in.Celsius | Paro | Thimphu | Punakha | Trongsa | Bumthang | Mongar | Trashigang |
| Max | 11.6 | 14.9 | 19.5 | 18.6 | 12.7 | 18.1 | 23.4 |
| Min | -1.3 | -0.7 | 5.9 | 2.1 | -1.9 | 9.9 | 12.0 |
Average temperatures in various regions of Bhutan in December 2017
| Values.in.Celsius | Paro | Thimphu | Punakha | Trongsa | Bumthang | Mongar | Trashigang |
| Max | 10.8 | 14.1 | 18.7 | 17.8 | 11.9 | 17.3 | 22.6 |
| Min | -2.1 | -1.5 | 5.9 | 2.1 | -2.7 | 9.1 | 11.2 |
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