Ha'il sits at roughly 1,000 metres above sea level, which moderates its desert climate compared to the coastal cities. Even so, summers (June to September) are brutal — daytime temperatures regularly reach 40 degrees Celsius and the sun is unforgiving. The best months to visit are October through April, when days are warm and pleasant and nights are cool enough to require a jacket.
The Ha'il International Camel Festival, held each year in winter, is the highlight of the regional calendar. It draws thousands of visitors for camel races, falconry displays, traditional crafts markets, and competitive poetry recitation — a distinctly Saudi celebration of Bedouin culture that has few equivalents elsewhere. If you can time your visit to the festival, do so. Book accommodation well in advance.
Spring brings desert flowers to the Nafud and the mountain wadis after good rains — a brief but spectacular transformation of the landscape. April is often the sweetest month: warm enough to be comfortable, still green from winter rains, and the tourist season has not yet wound down.