Despite being in the desert, January in Las Vegas can be chilly. With an average high of 57ºF, January is definitely outside of Las Vegas' pool season.
Las Vegas turns out of winter in February, with average high temperatures in the low to mid 60s. Pool season is around the corner, but except for a few exceptionally warm days, February is still too cold for swimming.
Spring is in the air in Las Vegas in March, with average high temperatures in the upper 60s. Late March marks the beginning of pool season in Las Vegas, but should you decide to soak in some rays, you might have to endure a strong breeze.
Las Vegas weather in April is gorgeous, but can begin to feel hot towards the end of the month. With an average high temperature of 78ºF, pool season is in full swing by the middle of the month.
Summer is here! May weather in Las Vegas is still nice, but can be hot during the middle of the day. With an average high temperature of 88ºF, you will want to duck into your favorite air conditioned hotel during early afternoon.
With an average high reaching nearly 100ºF, the heat is on in Las Vegas in June. Luckily, an air conditioned hotel is never more than few minutes' walk away. A pool can be a good option to try to beat the heat, but expect a crowded scene.
July is the hottest month in Las Vegas, with average highs over 100ºF throughout the entire month! If you want to walk the Strip, avoid going before late afternoon. If you do venture outside in the heat of the day, stay hydrated, and remember that an air conditioned hotel is never more than few minutes' walk away.
August weather in Las Vegas is very hot, with average highs over 100ºF! Pools are packed and can be a great way to fight the heat. If you choose to be a part of the pool party scene, be sure to stay hydrated by drinking plenty of water along with your cocktails.
September weather in Las Vegas is still hot but not nearly as stifling as August. The early September Labor Day crowd can expect highs in the upper 90s while late September travelers see highs in the low 90s. Pools will be busy, but not as packed as the summer months.
Las Vegas weather in October is beautiful with the average highs around 80ºF. It is the perfect month to explore the Las Vegas Strip with a comfortable walk at any time of day. Pool season unwinds in October.
November weather in Las Vegas is cooler, with average highs in the mid 60s. A midday walk down the Strip can be comfortable, but be sure to dress in layers to prepare for Las Vegas' unpredictable weather.
December weather in Las Vegas can be cold (relatively speaking) with highs in the mid 50s. It's a rare occurrence, but you might even see some snow!