June and July are supposed to be the best times to visit the mountain ranges, not that these are the warmest months, but also enjoy long hours of day night. Well, it is supposed to be the month with the least rain, too!
Unfortunately (or fortunately), we had the privilege to 'enjoy' some light showers on the 2nd day, which explained why no photos were taken despite the fact that we visited Stanley Park (in the Hop in, Hop off bus). Similarly, the wind breaker had the opportunity to air itself when we arrived at Kamloops on the following day, as well as the day when we arrived in Vancouver towards the end of the Rocky Mountaineer trip.
Long days are in particular good when travelling to unfamiliar places, when we needed to roam around to find eating places for dinner. Of course, I had missed the starry skies in Jasper, that is known for its real dark skies!
Source (of temperature): https://www.rockymountaineer.com/faq
The planning of this trip started since June 2017, after returning from the self-planned solo Amsterdam trip. The notion of train ride has been there all this while - which I think, would offer a totally different experience. Looked up for various popular train rides in Australia and Canada, that possibly landed up with overnight rides. In addition, June would be a good time to go places that are less accessible in December. Heard of the amazing scenery of the Canadian Rockies. Heard about memorable rides, too. (Oh yes, I remember what Peter told me when we were colleagues back in NAS, before his retirement.) While I was examining the various packages offered by the Rocky Mountaineer, a tinkle came... and a chat started with a service personnel! That's the wonders of technology and it has helped me to make a choice, too!