The USA is a year-round destination and when (and where) you go depends on whether you fancy skiing, surfing or just lazing in a spa. Generally speaking, the North tends to be warm in the summer, but can be cold and cosy in winter. The South is generally warm throughout the year, with milder winters and sweltering summers. The spring and autumn can be the most spectacular time to visit, with beautiful wildflowers and fall colours in many regions. Of course, Hawaii and the national parks have their own microclimate, so talk to your luxury hotel concierge for insider tips on what to expect.