Hi Smit, Spiti Valley temperature in August varies from 15° Celsius to 4° Celsius, and contrary to the popular opinion, it seldom rains. So, don't let yourself fall for the myth because while a lot of other places receive heavy downpour during this month, Spiti usually doesn't. Attached below are few packages offered by Tripoto for hassle free travelling. Please take a look, fill the form and someone will get in touch with you. Thanks!