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The weather varies greatly throughout the year in Las Vegas â the winter months are dry and cold with short days and long nights, whilst the summer months are blisteringly hot with long days and short nights. Las Vegas is located in Nevada in the Mojave Desert.
Las Vegas Weather in May. Las Vegas, Nevada begins to get a taste in May of the extremely hot weather that will dominate for the next few months. This usually is the first month for 100-degree Fahrenheit temperatures (over 37 Â°C) and thunderstorms. This page gives detailed information on the typical May weather for Las Vegas.