In addition to BC cooling over the last 15 years, so are the following Canadian Provinces and Territories.
Alberta ( -0.366C / decade), Saskatchewan (-0.411C/ Decade) , Manitoba (-0.231C / Decade) , Northwest Territories (-0.28C/ Decade), Yukon (-0.411C)/ Decade
The data is slightly different from the BC post in that I now only use stations with Climate Normals and 170 out of 180 data points in the last 180 months. In the case of BC it actually changes the cooling slightly.
Instead of -0.501C / Decade it is -0.463C/ Decade. Graphs below. Click for full size.