December weather forecast and climate
Las Vegas, NV

A night aerial view of the Las Vegas strip in Nevada, USA
A night aerial view of the Las Vegas strip in Nevada, USA
December is the coldest month in Las Vegas and the start of the mild and chilly winter - average highs are at a comfortable 57°F (13.9°C), but the average lows are at a chilly 38°F (3.3°C). Though snow is rare in Las Vegas, the mountain ranges encompassing it accumulates it in moderate quantities.
December is the perfect time for an excursion in the hottest desert areas or skiing in the Spring Mountains. Be warned - Las Vegas is crowded with an influx of visitors during the winter, especially on New Year's Eve.
Average temperature in December - Las Vegas, NV
  • Average high temperature in December: 56.6°F

The warmest month (with the highest average high temperature) is July (104.2°F).
The month with the lowest average high temperature is December (56.6°F).

  • Average low temperature in December: 38.7°F

The month with the highest average low temperature is July (80.9°F).
The coldest month (with the lowest average low temperature) is December (38.7°F).

Average humidity in December - Las Vegas, NV
  • Average humidity in December: 45%

The month with the highest relative humidity is January (45.1%).
The month with the lowest relative humidity is June (16.5%).

Average rainfall in December - Las Vegas, NV
  • Average rainfall in December: 0.5"

The wettest month (with the highest rainfall) is February (0.8").
Driest months (with the lowest rainfall) are May and June (0.1").

Average rainfall days in December - Las Vegas, NV
  • Average rainfall days in December: 3 days

The month with the highest number of rainy days is February (4 days).
The month with the lowest number of rainy days is June (0.6 days).

Average daylight in December / Average sunshine in December - Las Vegas, NV
  • Average daylight in December: 9.7h

The month with the longest days is June (Average daylight: 14.6h).
The month with shortest days is December (Average daylight: 9.7h).

  • Average sunshine in December: 7.6h

The month with most sunshine is June (Average sunshine: 13.4h).
The month with least sunshine is December (Average sunshine: 7.6h).

Average UV index in December - Las Vegas, NV
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 11).
The month with the lowest UV index is December (UV index 2).

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