The average temperature in Denver this September of 64.7 degrees was just a tenth of a degree cooler than the average, but that's still the coolest in 14 years. Colorado natives or longtime residents may feel like these cooler Septembers happened quite a bit more often before 1990, and the data supports that. More local videos here: https://youtube.com/@9news Subscribe to NEXT: https://youtube.com/@Nexton9NEWS Stay connected: 9NEWS Website: https://www.9news.com/ Facebook: https://www.facebook.com/ilike9news X: https://twitter.com/9NEWS Instagram: https://www.instagram.com/9newsdenver/ Download the 9NEWS App: https://www.9news.com/appredirect/ Sign up for the 9NEWSLETTER: https://www.9news.com/email 9NEWS (KUSA) is located in Denver, Colorado.