The average temperature in Bhutan in September between is 16°C and 25°C, the weather is cold.
During the day, it is recommended to wear cotton and linen shirts, thin skirts, thin T-shirts and other cool and breathable clothes.
At an average of 16 °C at night, it is recommended to wear warm clothes such as suits, jackets, windbreakers, casual wear, jackets, suits, and thin sweaters.
Average temperatures in various regions of Bhutan in September 2019
| Values.in.Celsius | Paro | Thimphu | Punakha | Trongsa | Bumthang | Mongar | Trashigang |
| Max | 23.4 | 23.1 | 27.5 | 22.6 | 21.6 | 24.7 | 30.0 |
| Min | 11.7 | 15 | 19.1 | 14.2 | 12.1 | 19.4 | 21.9 |
Average temperatures in various regions of Bhutan in September 2018
| Values.in.Celsius | Paro | Thimphu | Punakha | Trongsa | Bumthang | Mongar | Trashigang |
| Max | 23.8 | 23.5 | 27.9 | 23.0 | 22.0 | 25.1 | 30.4 |
| Min | 12.1 | 15.4 | 19.5 | 14.6 | 12.5 | 19.8 | 22.3 |
Average temperatures in various regions of Bhutan in September 2017
| Values.in.Celsius | Paro | Thimphu | Punakha | Trongsa | Bumthang | Mongar | Trashigang |
| Max | 23.0 | 22.7 | 27.1 | 22.2 | 21.2 | 24.3 | 29.6 |
| Min | 11.3 | 14.6 | 18.7 | 13.8 | 11.7 | 19.0 | 21.5 |
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