The highest day temperature in December 2025 was 78°F. The lowest night temperature was 37°F. The average values for day and night temperatures during December were 68.2°F и 45.4°F respectivly.

Most of the days in December are sunny but you can also expect cloudy and gloomy days.

Precipitation total in December for Las Vegas is 0.2 in. This value is relatively stable throughout the year.

The average wind speed in December is 4.8 mph. It makes December the most windless month of the year for Las Vegas.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Las Vegas in December is 7.9 hours.