Colorado has two tourist seasons: warm and cold. Those who want to see the state’s parks and other scenic wonders, hike, mountain-bike, or raft will usually visit from May to October; those who prefer skiing, snowboarding, and snowmobiling will obviously have to wait for winter, usually from late November to March or April, depending on snow levels. Although you can visit most major museums year-round, some, especially in smaller communities, close in winter. The best way to avoid crowds at the more popular destinations is to try to visit March through May and October through mid-December.
To hear Coloradans tell it, the state has perfect weather all the time. Although they may be exaggerating just a bit, the weather is usually quite pleasant, with an abundance of sun and relatively mild temperatures in most places--just avoid those winter snowstorms that come sweeping out of the mountains.
Along the Front Range, including Denver, Boulder, and Colorado Springs, summers are hot and dry, with mild evenings and cool nights. Humidity is low, and temperatures seldom rise into the 100s. Evenings start to get cooler by mid-September, but even as late as November the days are often sunny and warm. Surprisingly, winters are milder and less snowy than those in the Great Lakes region or New England; many golf courses remain open year-round.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.