The most ideal time to visit the Tanot Mata Temple in Jaisalmer is from October to March, during the winter season when the weather is relatively cooler and pleasant. The desert climate of Rajasthan witnesses scorching heat during the summer months, making outdoor excursions quite challenging. Winter provides a reprieve from the extreme temperatures, with daytime temperatures that are comfortable for sightseeing and particularly conducive for paying homage at the temple. This period also coincides with the festive season in India, including Diwali, and sometimes Holi, which can add a cultural dimension to your visit.
If you are keen on experiencing local culture and spirituality at its peak, consider planning your visit around the time of the Tanot Mata Fair which is held every three years (the next being in 2023, 2026, etc.). This fair attracts devotees from across the country, and it's a period during which you can immerse yourself in the local Rajasthani traditions and witness a plethora of cultural activities. However, it's essential to book your accommodations well in advance if you wish to visit during the fair or any major festival as these times draw large crowds and can lead to a shortage of places to stay.