The Denver-metro area is known for its semi-arid, high-desert climate, though the weather is heavily influenced by the proximity of the Rocky Mountains and Front Range.
If there was one word to accurately describe the climate in Colorado, it would be "unpredictable". In fact, the only thing remotely predictable is the chance of sunshine (the state averages over 300 sunny days per year) and the changing of the seasons.
Spring brings a mixture of snowfall or rain showers, as well as 80 degree days.
Summers are relatively mild and dry with an occasional thunderstorm or snowfall. (Yes, snow! The last recorded snow during summer was in Independence, Colorado on June 11, 2007.)
Fall features spectacular color due to the changing of the aspen leaves (mid-to-late September) and mild temperatures -- or as we call it, "jeans and t-shirt" weather. Traditionally, the first snowfall occurs in late October or early November.
Winter also varies in temperature with a record low of -61°F in 1985 and a record high of 83°F in 1999. Though the city gets a fair amount of snow in the winter, it usually melts within a few days.
The best advice about Colorado weather is to be prepared for anything. After all, sometimes when there's a blizzard in the mountains, it's a sunny, 70 degree day in the foothills!