For travel,America is a very big city,so want to choose a good time and location.Take a good map because you may want to travel throughout the United States.
The most suitable to New York city and Washington,d.c.time is may or October.Then not too hot.In winter,there are many of the snow.
September to New England is the best.The cold weather will gradually,the leaves will gradually become angry.Take your photograph opportunity is a good idea,because you may want to take some of the autumn leaves.
Four thousand kilometers from the Los Angeles,California,one year is good weather.December is the best time to bask,bring your swimsuit because you might want to swim in the sea.
In the northwest,not very cold,but there will be a lot of rain,so take an umbrella.In June and August visit Alaska is very comfortable,but may be very cold at night.So remember to put some warm clothes.But don't come in winter.Then all is dark and cold biting.
In Texas and southeastern region in summer,there will be a storm or fall sometimes.And many other places,there usually is very hot,very clear.
So what is the best time to visit the United States?Any time,as long as you like!