January in Las Vegas averages a daily high of 14.8°C with nights around 4°C. Expect roughly 3.3 wet days totalling 14.4mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Las Vegas is March–April.
Based on LAS VEGAS AIR TERMINAL, NV US (6.5km), 1995–2024. 24 years of January data.