LAS VEGAS · MAY · 36.1° N
Las Vegas in May averages an 88.5°F high and a 66.1°F low, with 0.07 inches of rain across the whole month. That is the last comfortable stretch before June arrives at 99.4°F and pushes everything outdoors into the hour after sunrise. May is the month people book when they want a canyon morning and a pool afternoon on the same day.
The day splits cleanly. Mornings and evenings belong outside, the middle of the afternoon belongs to shade, altitude or air conditioning. Sunset lands at 7:41 p.m. on May 15, so a flight that gets in before noon still buys a full first day, and dinner at seven happens in daylight.
THE MONTH AT A GLANCE · LAS VEGAS · MAY
May gives Las Vegas 88.5°F afternoons, 66.1°F nights and almost no rain, the last month before June’s 99.4°F highs move every outdoor plan to dawn.
AVG HIGH 88.5°F · 0.2 RAIN DAYS · SUNSET 7:41 P.M. ON MAY 15
Go for: driving and hiking at Red Rock Canyon before the June heat, 14 hours 9 minutes of daylight, and evenings warm enough to eat outside.
Think twice before: planning a midday walk on open asphalt: 88.5°F is a valley-floor monthly average measured at the airport, not a day’s ceiling.
Normals: NOAA NCEI 1991-2020, station USW00023169 · Daylight: sunrise-sunset.org · full sources at the end
On this page
- Las Vegas weather in May88.5°F highs, 0.07 inches of rain, 14 hours of daylight
- How hot it gets in the afternoonThe 22.4-degree gap between day and pre-dawn
- Crowds, prices and booking in MayWhat we could verify, and the room-tax caveat
- Things to do in Las Vegas in MayRed Rock Canyon, the Spring Mountains, Fremont Street
- Two days in Las Vegas in MayAn hour-by-hour plan around a 7:41 p.m. sunset
- May vs April vs JuneHow the three months compare, degree by degree
- Is May a good time to visit Las Vegas?Who should go, and who should move to April
Hotel districts, show tickets and airport logistics don’t move with the calendar, so they sit in the twelve-month view and in the wider destination guides. The normals below come from one weather station and one sunrise table, both named in full at the end.
Las Vegas weather in May: average highs, lows and rain days
| May, at the airport station | Figure |
|---|---|
| Average high | 88.5°F (31.4°C) |
| Average low | 66.1°F (18.9°C) |
| Precipitation, whole month | 0.07 in |
| Days with 0.10 in or more | 0.2 |
| Days with 1.00 in or more | 0.0 |
| Daylight on May 15 | 14 h 09 min |
| Sunrise / sunset, May 15 | 5:32 a.m. / 7:41 p.m. |
Every figure here comes from the NOAA NCEI 1991-2020 monthly normals for station USW00023169, the thermometer at Las Vegas McCarran Airport on the valley floor. That siting matters in a city ringed by open desert and by the Spring Mountains, both of which cool off faster at night than the runway does. Take 88.5°F and 66.1°F as the valley’s numbers, not the reading at a trailhead or on a ridge. These are station measurements rather than a reanalysis grid cell, and the two rarely agree to the tenth of a degree.
Rainfall for the entire month averages 0.07 inches, and only 0.2 days record at least a tenth of an inch. Translated into a trip, measurable rain turns up in roughly one May in five, and when it does it is a single interruption rather than a pattern. An outdoor afternoon booked in Las Vegas in May does not need a fallback for water. Pack the sun hat rather than the rain shell.
Between the two normals sits a gap of 22.4 degrees: 88.5°F by mid-afternoon, 66.1°F before dawn. A pool deck at four and a patio at ten in the evening ask for different clothes, and the ground outside the built-up valley sheds its heat faster still. A long-sleeve layer for the evening, sunscreen for the middle of the day and closed shoes for any canyon walking cover the whole month.
On May 15 the sun rises at 5:32 a.m. and sets at 7:41 p.m. local time, giving 14 hours and 9 minutes of daylight according to sunrise-sunset.org. Leaving a trailhead at six buys four cool hours, and a seven o’clock dinner outdoors still has light on the table. Arriving on a late-evening flight hands the first day back only after dark, which is why the morning arrival is worth paying for in this particular month.
How hot is Las Vegas in May?
The month’s two headline figures are an 88.5°F average high and a 66.1°F average low, 22.4 degrees apart. Both are thirty-year averages, not the maximum of any single day. The month also climbs steadily: April closes on a 78.5°F average high, June opens at 99.4°F, and May is stretched between the two.
Before nine in the morning, a shirt is enough. By two in the afternoon the shaded side of the street is the only side worth walking and water stops being optional. Evenings hold warm, since 66.1°F is the pre-dawn floor rather than the dinner-hour temperature, so a patio at nine still works without a jacket for most people.
Freezing nights belong to the winter pages. The 1991-2020 normals for this station carry no freeze-day count for May, and an average low of 66.1°F sits more than thirty degrees above freezing, so nothing in a May suitcase needs to survive frost. The Spring Mountains above the valley are a separate climate, and this station takes no reading up there.
How busy is Las Vegas in May? Crowds, prices and booking lead time
No monthly hotel-rate series and no occupancy series for Las Vegas could be verified alongside the climate normals in September 2026, so May gets no ranking against the other eleven months here. What is measurable is the weather argument that drives demand: 88.5°F is still pool weather, June’s 99.4°F is a different proposition, and May closes the run of months where an outdoor afternoon is a reasonable plan.
With no lead-time data to quote, booking in May follows the daylight instead. Reserve the rental car when you reserve the room if Red Rock Canyon or the Spring Mountains are on the list, because the cooler ground outside the valley is a driving trip. Price two quotes for the same nights with taxes and fees included before comparing them, and check the flight’s arrival hour against a 7:41 p.m. sunset.
No room-tax rate and no resort-fee amount for Las Vegas could be verified when the May normals were read, so neither is given a number above. If a quote shows either line, ask the property for the all-in nightly total before it goes on the card. Two rooms advertised at the same headline rate can land several dollars apart per night once those lines are added.
One budget line changes May more than the rest: the car. The 88.5°F average is measured on the valley floor at the airport, and the Spring Mountains northwest of town run cooler than that reading at every hour of the day. Without a car, a hot afternoon has two answers, a pool or a ceiling. With one, it has a third at altitude, and that is the difference between a valley trip and a valley-and-mountain trip.
Things to do in Las Vegas in May: Red Rock Canyon, the Spring Mountains and Fremont Street
May is the last full month before June’s 99.4°F wall, and the difference is 10.9 degrees of afternoon. A canyon drive, a long walk downtown and a pool afternoon all fit inside one May day. They stop fitting together once the average high sits within a degree of 100 and the outdoor half of the trip collapses into the two hours after sunrise.
Red Rock Canyon, west of the city, is the drive-and-hike option closest to the Strip. The Spring Mountains and Mount Charleston, northwest, are the high and cool one. Fremont Street downtown and the Strip itself are the after-dark walks. Entry fees, timed-entry rules and seasonal hours for the canyon loop could not be verified when the normals were read, so no price and no opening hour appears above: check the Bureau of Land Management page the week you drive out.
Those trails hold their shape all year. What moves is the air around them: 78.5°F in April, 88.5°F in May, 99.4°F in June, all at the same airport thermometer. A route that feels easy at 8 a.m. in May is the identical route at 8 a.m. in June carrying eleven extra degrees, which is the whole seasonal argument for coming now rather than in five weeks.
No current ticket price for a Las Vegas attraction could be verified for this update, so no dollar amount is quoted above. What May hands over free is light: 14 hours and 9 minutes of it on May 15, with the sun still up at 7:30 p.m. for a walk down the Strip long after the afternoon peak has passed.
Las Vegas in May: a two-day itinerary
Day one runs on the light. Out by 6 a.m., with the valley near its 66.1°F low, west to Red Rock Canyon for two or three hours, back in town by eleven for a long indoor lunch. Give the afternoon to a pool or a cooled room until about five. Then the Strip on foot as the temperature slides off its 88.5°F peak, dinner outside at seven, with sunset at 7:41 p.m. falling in the middle of it.
Day two goes up rather than out: the Spring Mountains for the morning, where the air runs cooler than the valley-floor reading, back down for the hot hours, Fremont Street after dark. If the month’s one wet day lands on your weekend, swap the order and move the canyon morning to the second day. With 0.07 inches as the entire monthly average, the interruption is short and the rest of the plan survives it.
Las Vegas in May vs April and June
| April | May | June | |
|---|---|---|---|
| Average high | 78.5°F | 88.5°F | 99.4°F |
| Average low | 56.9°F | 66.1°F | 75.8°F |
| Precipitation | 0.20 in | 0.07 in | 0.04 in |
| Days with 0.10 in or more | 0.5 | 0.2 | 0.1 |
Side by side, the three afternoons read 78.5°F, 88.5°F and 99.4°F, and the three nights 56.9°F, 66.1°F and 75.8°F. May sits 10.0 degrees above April and 10.9 below June, almost exactly between them. Rain shrinks across the same stretch, from 0.20 inches to 0.07 to 0.04, with wet days at 0.5, then 0.2, then 0.1. No sea-surface figure applies in a desert valley, and the only water temperature on the trip is whatever the hotel keeps its pool at.
Move four weeks back and April takes ten degrees off the afternoon, at the cost of 56.9°F mornings that want a jacket at a trailhead and more than double the wet days, 0.5 against 0.2. Move four weeks forward and June is the driest of the three at 0.04 inches, paid for with 99.4°F afternoons and nights bottoming out at 75.8°F, nearly ten degrees above May’s pre-dawn low.
Is May a good time to visit Las Vegas?
Yes for anyone whose trip has an outdoor half: hikers, drivers, pool people, anyone who wants dinner outside at seven with the sun still up. No for anyone planning to spend the middle of the afternoon on foot without shade, because 88.5°F over open asphalt is not a stroll, and no for anyone who wants genuinely cool mornings, since 66.1°F before dawn is as cool as the valley gets all month.
If that second description fits, move the trip to April. An average high of 78.5°F and a 56.9°F morning keep the canyon comfortable from opening to closing, and the extra rain, 0.5 days at a tenth of an inch, is a small price. The full month-by-month comparison sits in the best time to visit guide, and the seasonal view across destinations is in our month planner.
What May holds that neither neighbor does is the combination: 14 hours and 9 minutes of daylight with the afternoon still under 90°F. April’s days are shorter, June’s are hotter by 10.9 degrees.
The last word
The decision worth making early is the rental car, since it is what separates a valley stay from a valley-and-mountain one, and May is the last month where both halves work in a single day. Book it with the room, keep the mornings outdoors and the two o’clock hour under a ceiling, and take the rain gamble without insurance: in the 1991-2020 normals, an average May at the airport station records 0.0 days with an inch or more of precipitation, and 0.07 inches for the entire month. New to desert trips? Start with Travel 101.
Sources & data for this guide
- May normals: average high 88.5°F, average low 66.1°F, 0.07 in precipitation · NOAA NCEI monthly normals 1991-2020, station USW00023169, Las Vegas McCarran Airport · checked Sep 15, 2026
- Wet days: 0.2 days at 0.10 in or more, 0.0 days at 1.00 in or more · same NOAA NCEI normals · checked Sep 15, 2026
- April and June normals used in the comparison table · NOAA NCEI 1991-2020, same station · checked Sep 15, 2026
- Daylight of 14 h 09 min, sunrise 5:32 a.m. and sunset 7:41 p.m. on May 15, local time converted from UTC · sunrise-sunset.org · checked Sep 15, 2026
- Siting caveat from the station record: the normals are measured on the valley floor at the airport, while the surrounding desert and the Spring Mountains run cooler at night.
- No hotel rate series, room-tax rate, resort-fee amount or attraction ticket price could be verified for this update, so none is quoted above. Fees and hours change, check operators when you book.