Between early June and early September you can expect temperatures in the high sixties all the way up to a hundred degrees Fahrenheit, depending on whether you are in the high desert of Wyoming, the plains of Idaho or the mountains of Colorado. Be prepared for wild variations in the mountains – and, of course, the higher you go the colder it gets. The altitude is high enough to warrant a period of acclimatization, while the sun at these elevations can be uncomfortably fierce. In fact, parts of Wyoming and Colorado bask in more hours of sunshine per year than San Diego or Miami Beach. Spring, when the snow melts, is the least attractive time to visit, and while the delicate golds of quaking aspen trees light up the mountainsides in early autumn, by October things are generally a bit cold for enjoyable hiking or sports. Most ski runs are open by late November and operate well into March – or even June, depending on snow conditions. The coldest month is January, when temperatures below 0°F are common.

Travel offers; book through Rough Guides

USA features

The latest articles, galleries, quizzes and videos.

15 of the most beautiful places in Alaska

15 of the most beautiful places in Alaska

With mountains to climb, rivers to raft, glaciers to coo over and a bevy of bears to photograph, Alaska is the ultimate wilderness. From the moment you arrive, …

18 Jan 2017 • Sarah Reid camera_alt Gallery
8 ideas for cheap vacations in the US

8 ideas for cheap vacations in the US

Only a few of us can take a vacation that includes a private jet and a 15-course chef’s tasting menu at a top restaurant. For the rest of us, we have to make …

17 Jan 2017 • Jason Frye insert_drive_file Article
Why Atlanta is one of the top 10 cities you should visit in 2017

Why Atlanta is one of the top 10 cities you should visit in 2017

Georgia’s leafy capital is due its time in the spotlight. Dynamic, progressive and home to one of the country’s most exciting food scenes, Atlanta is the ne…

11 Jan 2017 • Eleanor Aldridge insert_drive_file Article
View more featureschevron_right

Join over 60,000 subscribers and get travel tips, competitions and more every month

Join over 60,000 subscribers and get travel tips, competitions and more every month