- Climate is a hugely important factor to consider as the right weather can make or break your campervanning holiday, whether it your trip is for three weeks, three months or three years! Luckily, America's climate makes it possible to enjoy fantastic weather year round if you go to the right places at the right time – although of course Mother Nature is far from predictable so you should be prepared for any eventuality, particularly if you're planning to take your RV through regions with extreme climates, or to remote areas.
- The South has warm temperatures year-round, while tremendous seasonal changes-snowy winter months and hot, humid summer months-characterize the Northeast and Midwest. The coastal areas of the West have a moderate climate, while the mountainous areas see more seasonal variations. The deserts of Arizona and Nevada are extremely hot and dry. As a rule, the country is mostly temperate, but tropical in Hawaii and Florida, arctic in Alaska, semiarid in the Great Plains west of the Mississippi River, and arid in the Great Basin of the southwest. Low winter temperatures in the northwest are ameliorated occasionally in January and February by warm Chinook winds from the eastern slopes of the Rocky Mountains.
- The climate can vary dramatically, not just within a state, but within a small region. In the mountains of Colorado for example, you could have been cycling in shorts in July and within an hour later been freezing in 35-degree (F) snow. Be prepared!
- Much of the U.S. is open and cloudless. Sunscreen, hats and sunglasses are the norm. Hats are a must, too. And everyone sunburns more at high altitudes – and many of the fantastic scenic areas of the U.S. – especially in the west – are at significantly higher elevation than you might be used to. Most of Yellowstone National Park is above 7,500 feet (2,300 meters); elevations in Rocky Mountain National Park range from 8,000 to 14,000 feet (2,400-4,200 meters). Altitude can cause significant breathing and other health problems. The simple rules are: 1) go slow the first day or two at altitude, 2) drink lots of water, and 3) limit alcohol intake.
The seasons are as follows:
Spring: March, April, May
Summer: June, July, August
Fall: September, October, November
Winter: December, January, February