Destination guide
Las Vegas weather by month
April, May and October are the best months for a Las Vegas trip if you want warm weather without the fiercest summer heat. April averages 25°C by day, May reaches 30°C and October sits at 26°C. Choose April or October for more comfortable time outdoors; May suits travellers who prefer it hotter. Summer needs careful timing around the midday heat, while winter offers cooler days but calls for proper layers after sunset.
- Hottest month
- 38.9°CJuly
- Coolest month
- 12.9°CDecember
- Rain per year
- 142mmaverage total
- Flight from London
- 11 h 18 minLong-haul (7 h+) · estimated
Las Vegas, month by month
A little perspective
Las Vegas through the year
Every month at a glance; "best" marks our three top months on warmth, dryness and sunshine.
| Month | Day | Night | Sun/day | Rain mm | Rainy days | Days 25°C+ |
|---|---|---|---|---|---|---|
| January | 13.8°C | 3.7°C | 5.8 | 22 | 4 | 0% |
| February | 16.1°C | 5.2°C | 6.2 | 29 | 5 | 1% |
| March | 20.6°C | 8.7°C | 7.3 | 16 | 3 | 21% |
| Aprilbest | 25.1°C | 12.2°C | 8.8 | 7 | 2 | 53% |
| Maybest | 30.3°C | 17.0°C | 10.0 | 5 | 1 | 85% |
| June | 36.1°C | 22.3°C | 12.1 | 2 | 0 | 98% |
| July | 38.9°C | 26.3°C | 11.0 | 7 | 2 | 100% |
| August | 37.9°C | 25.6°C | 10.7 | 9 | 2 | 100% |
| September | 33.6°C | 21.2°C | 10.3 | 7 | 1 | 98% |
| Octoberbest | 26.2°C | 14.6°C | 8.6 | 8 | 2 | 64% |
| November | 18.5°C | 8.1°C | 7.1 | 10 | 2 | 9% |
| December | 12.9°C | 3.5°C | 5.8 | 20 | 3 | 0% |
Day = average daytime high, night = average night-time low, 1991-2020.Sun is hours per day; rainy days count 1 mm or more.
Day, night and sea
Monthly average temperatures, 1991-2020
- Day
- Night
Best months here
On warmth, low rainfall and sunshine, start with these.
When to go to Las Vegas
For beach weather, look at months where the daytime average clears 25°C and rainy days stay low: April, May, June, July, August, September, October. February is the wettest month (29 mm, about 5 rainy days) and June the driest (2 mm).
Getting there
A direct flight from London Gatwick to Harry Reid International Airport (LAS, 10 km from Las Vegas) takes roughly 11 h 18 min - long-haul (7 h+) by UK standards. Time-zone: America/Los Angeles.
Records and extremes, 1991-2020
The hottest day recorded in Las Vegas between 1991 and 2020 reached 46.4°C on 20 June 2017; the coldest fell to -6.8°C on 19 December 2008. In July one day in ten tops 42.4°C and about 99% of days pass 30°C; in December one night in ten drops to -0.9°C or below. The wettest single month of the period was December 2010 with 117 mm, against a December average of 20 mm.
Sunrise, sunset and daylight in Las Vegas
Local time on the 15th of each month; daylight-saving rules as of 2020.
| Month (15th) | Sunrise | Sunset | Daylight | Sunshine/day |
|---|---|---|---|---|
| January | 06:51 | 16:48 | 9.9 h | 5.8 h |
| February | 06:29 | 17:20 | 10.9 h | 6.2 h |
| March | 06:51 | 18:48 | 11.9 h | 7.3 h |
| April | 06:07 | 19:14 | 13.1 h | 8.8 h |
| May | 05:34 | 19:40 | 14.1 h | 10.0 h |
| June | 05:23 | 19:59 | 14.6 h | 12.1 h |
| July | 05:35 | 19:58 | 14.4 h | 11.0 h |
| August | 05:59 | 19:31 | 13.5 h | 10.7 h |
| September | 06:23 | 18:49 | 12.4 h | 10.3 h |
| October | 06:48 | 18:05 | 11.3 h | 8.6 h |
| November | 06:17 | 16:33 | 10.3 h | 7.1 h |
| December | 06:44 | 16:27 | 9.7 h | 5.8 h |
Spring: comfortable days give way to stronger heat
March is a good fit for travellers who prefer milder weather, with daytime averages of 21°C and nights of 9°C. Bring a light layer for the day and something warmer for evenings. April offers a useful balance: days average 25°C, but nights fall to 12°C, so it is not warm around the clock. By May, the daytime average reaches 30°C and sunshine averages 10 hours, making shade and breaks indoors more important around midday. May nights are milder at 17°C. Rain becomes less frequent through spring, so the main choice is between March's cooler conditions, April's warmth and May's more pronounced heat.
Summer: plan around the heat, not just the sunshine
June starts the summer with average daytime temperatures of 36°C and 12 hours of sunshine. July is the hottest month, averaging 39°C by day, while August remains close at 38°C. These are less comfortable months for long stretches outdoors, especially around midday. Plan outdoor time for early morning, take regular breaks somewhere cool and carry water. Evenings offer less relief than you might expect: average nights reach 26°C in both July and August. Light clothing makes sense, with a layer for air-conditioned interiors. June is the driest month, but July and August each average 2 rain days, so summer is not entirely rain-free.
Autumn and winter: a warm sweet spot, then chilly nights
September still feels hot, with days averaging 34°C and nights 21°C; it is better suited to heat lovers than travellers seeking mild weather. October brings a more comfortable balance of 26°C days and 15°C nights, with 9 hours of sunshine for outdoor plans. November is noticeably cooler at 18°C by day and 8°C at night, so pack layers rather than relying on summer clothes. December is the coolest month, with days around 13°C and nights of 4°C. January is similar, while February edges up to 16°C by day. Winter can suit travellers who dislike heat, but it is a weaker choice for a warm-weather holiday. Use the brighter daytime hours for outdoor plans and take a warm jacket for evenings.
A little more detail
Las Vegas weather FAQs
Plain answers, grounded in the averages.
What is the best time to visit Las Vegas?
Judged on warmth, low rainfall and sunshine, the best months in Las Vegas are May, October and April. July is the hottest month (average high 38.9°C) and December the coolest (12.9°C).
How many months a year is Las Vegas over 25°C?
7 months in Las Vegas average a daytime high of 25°C or more, and 8 average 20°C or more.
When is the rainy season in Las Vegas?
February is the wettest month in Las Vegas (29 mm on average) and June the driest (2 mm). Annual rainfall averages 142 mm.
What is the hottest temperature recorded in Las Vegas?
The hottest day recorded in Las Vegas between 1991 and 2020 reached 46.4°C on 20 June 2017; the coldest fell to -6.8°C on 19 December 2008. Records come from daily data for 1991-2020, not from a single station's all-time history.
Which months are best for spending time outdoors?
April and October offer the clearest balance of warmth without peak summer heat, averaging 25°C and 26°C by day. March is a cooler alternative at 21°C. May also works well if you enjoy hotter conditions, but allow for midday breaks.
Will I need warm clothes in Las Vegas?
Yes, especially from autumn through spring. December and January nights average 4°C, and even April nights average 12°C. A warm jacket is sensible in winter; lighter layers are useful during the milder months and for air-conditioned interiors in summer.
Is rain likely to disrupt a trip?
Rain days are relatively infrequent throughout the year. February has the most, averaging 5, while May and September each average 1. Most trips can focus on temperature rather than rain when choosing a month, though these averages do not guarantee a dry stay.
See also: United States weather by month · where else is hot in July
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid), 1991-2020
Averages computed from daily values at Las Vegas. Sunshine hours are estimated from average cloud cover.Records are the highest and lowest daily values in that 30-year period, not all-time records. These are climate averages, not a forecast for your trip. How we measure holiday weather
- Hot · 25°C+
- Warm · 20°C to below 25°C
- Mild · 15°C to below 20°C
- Cool · below 15°C