Your December weather guide
CoolWeather in Las Vegas in December
December suits a Las Vegas city break if you want cool-weather exploring rather than winter heat. Average afternoons reach 13°C, but nights fall to around 4°C, so a coat matters as much as sunglasses. About 5.8 hours of sunshine a day offers scope for time outdoors, though sunshine does not mean warmth. For a UK traveller, the appeal is brighter, milder afternoons than London, not a holiday spent in summer clothes.
Long-term climate averages for Las Vegas, not a forecast · 1991-2020
Las Vegas, month by month
Your snapshot
At a glance
The useful details for Las Vegas.
- Average daytime high
- 12.9°C
- 9 in 10 days stay below 18°C
- Average night-time low
- 3.5°C
- coldest 10% of nights: -1°C or lower
- Compared with London
- +5.2°C
- London averages 7.7°C in December
- Sunshine per day (est.)
- 5.8h
- 61% of 9.5 h of daylight
- Rainy days (1 mm+)
- 3
- 20 mm over the month
- Humidity
- 45%
- Days over 25°C
- 0%
- none over 30°C
- Record high 1991-2020
- 23.5°C
- 2017-12-03
- Record low 1991-2020
- -6.8°C
- 2008-12-19
- Flight from London
- ≈ 11 h 18 min
- 8424 km, long-haul (estimate for a direct flight)
Records are observed extremes within 1991-2020, not typical holiday conditions. Warm-day percentages are shares of days, not day counts.
How December compares
December is the 12th warmest month of the year in Las Vegas and ranks 107th of 134 destinations we compare for December - see where else is hot in December. Within United States it is 5th of 6 (United States in December). Against London's average high of 7.7°C in December, Las Vegas is 5.2°C warmer by day and 0.8°C warmer at night.
Daytime and night-time in December
The typical December day in Las Vegas peaks at 12.9°C, but that is an average: the warmest 10% of days reach 17.5°C or more. Days over 25°C are rare. Nights average 3.5°C; one night in ten drops to -0.9°C or lower, so pack a layer for evenings - it is genuinely cool after dark. Between 1991 and 2020 the hottest December day here reached 23.5°C (2017-12-03) and the coldest night -6.8°C (2008-12-19).
Rain in December
Some rain (4-8 rainy days): about 3 days with 1 mm or more, 20 mm in total. Year to year it varies a lot - the wettest December was 2010 with 117 mm, the driest 1999 with 0 mm. Humidity averages 45%.
Sunshine and daylight
Around 5.8 hours of sunshine a day (estimated from cloud cover), 9.5 hours of daylight: the sun rises about 06:44 and sets about 16:27 local time in mid-December. Average cloud cover is 39%.
Is December a good time to visit Las Vegas?
December is not the strongest month here: cool 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.
Milder than London, but still winter
Las Vegas is around 5°C warmer than London by day in December, but this is its coldest month. Plan outdoor time for the middle of the day, when conditions are likely to feel most comfortable, and keep warmer layers handy for evenings. A jumper and coat are sensible packing choices, with closed shoes rather than sandals. The warmer days can reach 17.5°C or more, but that is not the everyday expectation. At the other end, the coldest nights fall to -0.9°C or below. It suits travellers happy to walk in cool air and mix outdoor time with indoor breaks, rather than anyone relying on warmth.
Useful sunshine, limited daylight
Rain is less of a planning concern than the cold: December averages about 3 rainy days, so a flexible itinerary should leave room for outdoor plans. Still, pack a light waterproof rather than assuming every day will stay dry. There are only 9.5 hours of daylight, so avoid leaving all your outdoor time until late afternoon. The sunshine makes daytime exploring appealing, but keep your coat with you as the day draws towards evening. If your priority is a generally dry city break and you do not mind wrapping up, December is a reasonable choice. If warmth is the main reason for travelling, choose another month.
A little perspective
Las Vegas through the year
December is highlighted. See how it compares with the rest of the year.
| 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% |
| DecemberSelected | 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.
Keep exploring
Similar in December
Closest matches on daytime temperature, sea temperature and sunshine, in other countries.
Spain · 13°C by day · sea 15°C
Salou
Spain · 13°C by day · sea 15°C
Barcelona
Spain · 13°C by day · sea 15°C
Lloret de Mar
Italy · 12°C by day · sea 16°C
Rome
Italy · 13°C by day · sea 17°C
Amalfi Coast
A little more detail
Las Vegas in December FAQs
Plain answers, grounded in the averages.
Is Las Vegas hot in December?
Las Vegas is cool in December: the average daytime high is 12.9°C and nights average 3.5°C. Days over 25°C are rare in December.
How much does it rain in Las Vegas in December?
Las Vegas sees about 3 rainy days (1 mm or more) and 20 mm of rain in a typical December. The wettest December between 1991 and 2020 was 2010 (117 mm) and the driest was 1999 (0 mm).
How sunny is Las Vegas in December?
Las Vegas gets around 5.8 hours of sunshine a day in December out of 9.5 hours of daylight (estimated from average cloud cover).
How does Las Vegas compare with the UK in December?
Las Vegas is on average 5.2°C warmer than London by day in December (12.9°C against 7.7°C).
What is the hottest December on record in Las Vegas?
Between 1991 and 2020 the hottest December day in Las Vegas reached 23.5°C on 2017-12-03, and the coldest night dropped to -6.8°C on 2008-12-19.
Is December worth the long flight from London?
The flight from London takes about 11 h 18 min, so December makes more sense for a city-focused trip than a search for winter warmth. You get milder daytime temperatures than London, but cold nights and limited daylight remain part of the deal.
When should I go instead for warmer weather?
May, October and April are better choices overall if December sounds too cool. December is Las Vegas's coldest month, so it is not the time to choose for heat. It works better when comfortable layers and indoor breaks fit your plans.
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