Sunshine and blue skies are guaranteed almost every day in Abu Dhabi. Temperatures between June and September can be unbearably hot for most Westerners, exacerbated by high humidity and ranging between 85ºF (29ºC) and 109ºF (43ºC) in July and August. Air-conditioning is the norm in all buildings. The best time to travel to Abu Dhabi is between October and May. In January and February it even becomes cool enough to warrant wearing a cardigan outdoors, with temperatures ranging between 55ºF (13ºC) and 75ºF (24ºC). Rainfall is almost non-existent.