From mid-October through April, spring and fall clothing is comfortable. One should dress conservatively in public.
American citizens require valid visas to enter Qatar.
Generally, travelers are required to show evidence that a Qatari citizen or company will sponsor them during their stay in Qatar. Visas are also available through the major hotels for intended guests, but arrangements must be made several weeks in advance. Letters, videos, and packages are subject to inspection and censorship. Cable and telex lines to leading hotels and places of business are good. Telephone connections are excellent, and faxes are widely available.