The knee is the largest joint in the human body and is considered the most complicated one. It is formed by the lower part of the femur, the tibial plateau and the knee cap.
Calgary's spring weather is unstable. Some April and May days are sunny and warm, indeed hot. Yet April, May and sometimes even June(!) can bring snow. When it snows in late spring / early summer, the snow typically is wet and heavy, unlike winter snow that more often is light and fluffy.
If you need more detailed information on Calgary's climate, you can find detailed statistics on the Environment Canada Calgary climatology page. When to Go The most popular single event that attracts visitors to Calgary is the annual ten-day Western-themed festival known as the Calgary Stampede .