Grouse Mountain mild as the Lower Mainland. In December (the coldest month statistically), Grouse Mountain has an average high and low of and respectively. This freeze/thaw cycle can allow for large amounts of rain to fall on some occasions every winter. Nonetheless, heavy snow is more frequent in the winter, which allows for a deep snow-pack, lasting on average from mid-November until early May. Summer is warm and relatively dry. August is the warmest month, with an average high and low of and respectively. Grouse Mountain has built an observation deck (accessible by elevator) on a 1.5 megawatt wind turbine of Leitwind
Red grouse There are a wide range of research activities still going on today and a wealth of published literature exists on all aspects of grouse biology. The red grouse may be infected by parasites and viruses which severely affect populations. Strongylosis or 'grouse disease' is caused by the strongyle worm, which induces damage and internal bleeding after burrowing into the cecum. This endoparasite is often eaten with the tops of young heather shoots and can lead to mortality and poor condition, including a decrease in the bird's ability to control the scent it emits. Louping ill virus is a flavivirus (RNA