Hey Nishant, Please don't plan your trip now to spiti as the entire valley is been ravished with snowfall and you can't make it past manali by December 2nd week ... it's better for you to wait till next summer Bro .... Happy and safe Travelling !!!
Hey Anupama, Yes i do agree with the charm of spiti in winter ... but there are headlines popping up every now and then about lahaul and spiti valley disconnectivity due to snowfall ...and this is a major concern of knowing the place before going .. well if it's open and one can enjoy we are happy for that ..
Hey Nishant, You cannot go to Spiti via road from Manali ( the best scenic route to reach spiti). But you can go via Shimla. But problem is weather changes so drastically that you may get stucked in valley for days.But if you actually enjoy cold weather and negative temperature;then this is best time to go ( less crowd+cheap rates). Or you can go In Summers, Round trip Manali->Spiti Valley->Shimla. Hope this would help you.