Weather in Las Vegas in May

How May compares

May is the 5th warmest month of the year in Las Vegas and ranks 12th of 134 destinations we compare for May - see where else is hot in May. Within United States it is 1st of 6 (United States in May). Against London's average high of 16.6°C in May, Las Vegas is 13.7°C warmer by day and 8.7°C warmer at night.

Daytime and night-time in May

The typical May day in Las Vegas peaks at 30.3°C, but that is an average: the warmest 10% of days reach 36.0°C or more. About 85% of days top 25°C and 1 in 2 pass 30°C. Nights average 17.0°C; one night in ten drops to 11.3°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest May day here reached 42.1°C (2020-05-28) and the coldest night 5.6°C (1999-05-01).

Rain in May

Dry (3 rainy days or fewer): about 1 days with 1 mm or more, 5 mm in total. Year to year it varies a lot - the wettest May was 2016 with 16 mm, the driest 2002 with 0 mm. Humidity averages 20%.

Sunshine and daylight

Around 10.0 hours of sunshine a day (estimated from cloud cover), 13.9 hours of daylight: the sun rises about 05:34 and sets about 19:40 local time in mid-May. Average cloud cover is 28%.

Is May a good time to visit Las Vegas?

Yes - it is one of the better months: hot days, little rain and long sunny days. The best months for Las Vegas on our scoring are May, October, April; months averaging 25°C or more: Apr, May, Jun, Jul, Aug, Sep, Oct.

Expect proper heat, not just warm spring weather

Pack for summer rather than a typical May holiday at home. Temperatures reach 25°C on 85% of days and 30°C on 57%, so hot afternoons are a regular part of the month, not an occasional bonus. The warmest 10% of days reach at least 36°C, which can make long outdoor walks tiring. Keep more demanding plans for the morning, leave room for indoor breaks around midday, and carry water. Light, loose clothing makes sense during the day. May suits travellers who actively want heat; if you prefer spending the whole day outside without adjusting your pace, the warmer spells could feel restrictive.

Rain is a small concern; sun needs more planning

With about 1 rainy day in May, wet weather is unlikely to be the main constraint on your plans, though a completely dry stay is not guaranteed. Around 10 hours of daily sunshine within 13.9 hours of daylight gives you plenty of scope to move outdoor time away from the hottest part of the day. Take sunglasses, a hat and sunscreen rather than making waterproof clothing the focus of your packing. Humidity averages 20%, so this is dry heat rather than muggy weather. That does not make hot afternoons harmless: shade, water and breaks still matter, especially if you arrive expecting temperatures closer to a British spring.