Weather in Las Vegas in January

How January compares

January is the 11th warmest month of the year in Las Vegas and ranks 81st of 134 destinations we compare for January - see where else is hot in January. Within United States it is 5th of 6 (United States in January). Against London's average high of 7.4°C in January, Las Vegas is 6.4°C warmer by day and 1.5°C warmer at night.

Daytime and night-time in January

The typical January day in Las Vegas peaks at 13.8°C, but that is an average: the warmest 10% of days reach 18.3°C or more. Days over 25°C are rare. Nights average 3.7°C; one night in ten drops to -0.6°C or lower, so pack a layer for evenings - it is genuinely cool after dark. Between 1991 and 2020 the hottest January day here reached 23.0°C (2003-01-31) and the coldest night -6.7°C (2013-01-14).

Rain in January

Some rain (4-8 rainy days): about 4 days with 1 mm or more, 22 mm in total. Year to year it varies a lot - the wettest January was 1995 with 97 mm, the driest 2020 with 0 mm. Humidity averages 47%.

Sunshine and daylight

Around 5.8 hours of sunshine a day (estimated from cloud cover), 9.8 hours of daylight: the sun rises about 06:51 and sets about 16:48 local time in mid-January. Average cloud cover is 41%.

Is January a good time to visit Las Vegas?

January is not the strongest month here: cool days. The best months for Las Vegas on our scoring are May, October, April; months averaging 25°C or more: Apr, May, Jun, Jul, Aug, Sep, Oct.

Milder afternoons, properly cold nights

The daytime advantage over London is useful: Las Vegas averages 6.4°C warmer in January, making afternoon walks more appealing if you dress for cool conditions. That does not make it a warm-weather holiday. January sits near the cold end of the local calendar, and the coldest 10% of nights fall to -0.6°C or below. Pack a warm outer layer, jumpers and long trousers, with lighter layers underneath for milder afternoons. The warmest 10% of days reach at least 18.3°C, so you may get comfortable spells outside, but do not build your plans around them. Keep your coat handy if you will be out after dark.

Useful sunshine, but keep plans flexible

January offers about 5.8 hours of sunshine within 9.8 hours of daylight, so there is scope for time outdoors without needing summer heat. Put longer walks towards the middle of the day, when temperatures are more likely to be comfortable, and leave indoor plans for colder evenings. Rain is a consideration rather than a reason to rule the month out: about 4 days have measurable rain. A compact umbrella or showerproof outer layer is sensible, but there is no need to assume every day will be wet. The main compromise is the combination of limited daylight and chilly nights, rather than persistent rain.