Notices. 1  2017-08-27: Support will be closed on Monday, September 4, 2017 for the Labor Day statutory holiday; we will reopen at 7am (Pacific) September 5. 2  2017-08-02: Introduction to Intranet Administration Webinar | September 6, 2017 | REGISTER NOW.
The weather varies greatly throughout the year in Las Vegas â the winter months are dry and cold with short days and long nights, whilst the summer months are blisteringly hot with long days and short nights. Las Vegas is located in Nevada in the Mojave Desert.
Holiday Weather. December is one of the coldest months of the year in Las Vegas, USA, when the winter season is in full swing. The average temperature at the beginning of the month starts off at 10Â°C (created by highs of 15Â°C and lows of 5Â°C) on December 1st. Read more.