There's no right time to visit Himachal Pradesh. In the winter of 2016, I visited Dalhousie for a week. It wasn't as snowy as I had thought it to be. But it was windy. My hand shivered as I started drawing. After a day, the ink in my brush was frozen.
Here're some attempts to document Dalhousie as I've seen it.
Hope this excites you about the place and makes you travel if you haven't already :)