I realize the weather is unpredictable but this makes it almost impossible to determine when the best time to visit would be. Some people may only get to do these trips once in a life time so it’s important to know what times of the year might give you a better chance. For example, in Yellowknife, Canada they have a recommendation list by month based on their experience. That would be extremely helpful. I believe they base it on average and/or typical weather patterns. For example, September is usually cool and dry for them but then October and November are often cloudy/snowy due to the transition period. And then by mid-late December its usually very cold and clear as most of the snowfall has slowed down by that point. Any help is appreciated.