Las Vegas is cold in January, especially compared to the intense heat the Mojave Desert is known for. The city’s reputation for scorching temperatures often leads visitors to underestimate the winter chill. While the sun is almost always present, the low angle of the winter sun and the desert environment create a distinct cold that is noticeable, especially after the sun sets. A trip in January requires preparation for a true winter climate.
Average January Temperatures
January is the coldest month of the year in Las Vegas. The average daytime high temperature settles in the mid-to-high 50s Fahrenheit (around 57°F to 59°F). This temperature range makes for pleasant conditions when standing directly in the sun.
The average low temperature drops sharply into the high 30s Fahrenheit (around 38°F to 41°F). It is not uncommon for the thermometer to dip to or below the freezing point of 32°F on a few nights each month. Precipitation is minimal, with the city averaging less than one inch of rain for the entire month, and snowfall is extremely rare. The region benefits from abundant sunshine, with clear skies present for approximately 77% of daylight hours.
The Desert Chill Factor
The dry desert air influences how cold the January temperatures feel to the body. Unlike humid climates where moisture holds heat, the low relative humidity in the Mojave Desert allows heat to escape rapidly. This results in a penetrating, dry cold that can feel colder than the numerical temperature suggests.
The most dramatic temperature change occurs immediately after sunset, a phenomenon known as the desert switch. Without the insulating effect of humidity, the air temperature can plummet by 15 to 20 degrees in a short period. Wind is another factor, as even a light breeze can create a substantial wind chill effect, making a 58°F day feel much cooler when walking the Strip. The city’s elevation, over 2,000 feet above sea level, also contributes to the cooler winter conditions.
Practical Planning for the Cold
Layering clothing is the most effective strategy for managing the fluctuating temperatures throughout a January day. A light jacket or sweater is generally sufficient for the sunny daytime hours, especially when walking or engaging in outdoor activities. However, a heavier coat, scarf, and hat become necessary for comfort once the sun goes down and the temperature drops into the 40s.
Daytime activities like hiking at nearby Red Rock Canyon are enjoyable due to the mild temperatures and clear skies. Conversely, pool time is generally impractical unless the hotel features a heated pool or hot tub, as the air temperature is too cool for sunbathing. Indoor venues, such as casinos, restaurants, and theaters, are consistently climate-controlled and warm, meaning heavy outerwear can be shed upon entering.