Denver in September

April through October gives you the best weather, but each season brings something different. Spring arrives late — expect snow through April, sometimes May. But once it clears, the hiking trails open and the city shakes off winter. Summer means festival season. The Underground Music Showcase takes over South Broadway in July, while the Great American Beer Festival packs downtown in October. Hotel prices spike during these events, so book early or stay further out. Fall brings perfect hiking weather and golden aspens in the mountains. September and October see the most stable weather patterns — warm days, cool nights, minimal rain. Winter divides into two camps: powder days and inversion days. When it snows in the mountains, the skiing is world-class. But when high pressure settles in, Denver gets trapped under a brown cloud while the mountains sparkle above. Bring layers either way.