Weather in Las Vegas in January

Prime time. If you get to pick your dates, January is the one. Highs average 15.5 °C, lows 3 °C, and rain falls on 3 days — nothing in the month is working against you.

January ranks 6 of 12 in Las Vegas: past the worst of the year but short of April, which is the month to book if the dates are open.

Rain falls on only 3 days, so an itinerary with no wet-weather fallback is a reasonable risk. Pack for 15.5 °C days and 3 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 5 nights fall below freezing. Across the twenty years measured, the hottest January day reached 26.7 °C and the coldest night fell to -5 °C, and the wettest single day dropped 31 mm — roughly 172% of the month's rain in one day.

This is the volatile part. January rainfall has ranged from 0 mm to 62 mm across the twenty years measured — a 62 mm spread around an average of 18 mm. The average is real but almost no individual January looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind is light at 8.7 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 46%.

How January sits in the year

Temperatures hold steady either side: 14.6 °C in December, 15.5 here, 17.8 in February. Nothing about the timing within the month matters much.

Daylight in January

January sits at the dark end of Las Vegas's year — 9.9 hours of daylight against 14.6 at midsummer, gaining 0.6 hours across the month. Sightseeing days are genuinely shorter, and an itinerary built for summer will not fit.

An inland climate

With no coast nearby, the year swings a fair way — 38.7 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage.

How busy it gets

Busy. Popular without being frantic; book the things you care about, improvise the rest.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

January in Las Vegas versus nearby

If Las Vegas is one option among several, the nearby comparison is worth making. Riverside is close enough to be a coin toss — 4.9 °C warmer, 2 days more rain. Sedona is the weaker option in January — 3.5 °C cooler, 3 days more rain.

So: January works, with April the better month by 16 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Las Vegas

See all twelve months in Las Vegas, or where else to go in January.