Nan is one of the Northern state in Thailand. Neighboring provinces are (from south clockwise): Uttaradit, Phrae, and Phayao. To the north and east, it borders Sainyabuli of Laos.
Climate
Nan province has a tropical savanna climate. Winters are quite dry and very warm. Temperatures rise until April, which is very hot, with the average daily maximum at 37.0 °C (98.6 °F). The monsoon season runs from late April through October, with heavy rain and somewhat cooler temperatures during the day, although nights remain warm.