The best time to visit the Yamunotri is in the months of May to June and September to November . Yamunotri is cold all across the calendar, while winters making most activities difficult. Yamunotri is the source of the Yamuna River and the seat of the Goddess Yamuna in Hinduism. The sacred shrine of Yamunotri, source of the river Yamuna, is the westernmost shrine in the Garhwal Himalayas, perched atop a flank of Bandar Poonch Parvat. The chief attraction at Yamunotri is the temple devoted to the goddess Yamuna and the holy thermal springs.
The months of April to July is when temperature is bit high. The area is pleasant for a visit at this time, with temperatures rarely going beyond 20 degrees celcius.
The monsoon is during July to September. The maximium temperature goes to 30 and minimum temperature decreases to 22 degrees.
The winter is during October to March. This is the least ideal season to visit the place. Due to freezing winters, the roads are closed for most of the time in this season.