It may come as a surprise to you that Yellowknife experiences less than 300 mm or 12 inches of precipitation annually. In fact, despite its subarctic climate, the city has a frost-free farming season of around 100 days per year. Bordered by Great Slave Lake as well as mountain ranges to the west, Yellowknife has milder weather than one might think. Fall and winter temperatures are well below 0 C, but average temperatures typically do not fall below -30 C. Spring weather generally makes its first appearance here in May, with warmer temperatures continuing into September. The average summer temperature is around 19 C.
It probably goes without saying but visitors to Yellowknife will want to bring warm clothing as well as a warm winter coat, boots, mitts, scarf and hat. Even those visiting in the summer months will want to bring a jacket and sweater for the cool evenings.