Calgary has a population of over 1 million people, with the ages 35-39 being the most populated. The climate is cold, with temperatures around 27°F in the winter and warm summers. Calgary was originally inhabited by indigenous peoples and was later established as Fort Calgary in 1876. The city grew significantly due to the oil industry beginning in the mid-20th century. Calgary has a diverse population, with over 230,000 people identifying as a visible minority.