Considering weather conditions and deals, the best time to visit Las Vegas runs from March through May and September through November. Spring offers a comfortable temperature along with a variety of activities such as climbing, kayaking, and horseback riding. Temperatures and prices heat up between June and August, and Sin City twists into family-oriented place. You can get best room rates during the weekdays. Autumn in Las Vegas is often mild and hosts events like Life Is Beautiful Festival or Nellis Aviation Nation Air Show. Although the city can be a bit chilly from December to February, there is always an influx of party-goers during this period, especially for the New Year's, so book a room in advance.