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.
Weather. Calgary's weather is quite unusual compared to the weather in the rest of Canada. Where Eastern Canada and B.C. are quite humid, with ample rain and snow, Calgary is very dry most of the time, with an average annual precipitation of 41 cm (16 inches). While many Canadian homes have de-humidifiers, most Calgary homes have humidifiers.
Over the course of September in Calgary, the chance of a day with only rain decreases from 20% to 13%, the chance of a day with mixed rain and snow remains an essentially constant 1% throughout, and the chance of a day with only snow remains an essentially constant 0% throughout.