View Average Temperature In Las Vegas In January Pics. July is the hottest month in las vegas with an average temperature of 33.5°c (92°f) and the coldest is december at 8°c (46°f) with the most daily sunshine hours at 13 in august. Get the monthly weather forecast for las vegas, nv, including daily high/low, historical averages, to help you plan ahead.
The average low is 34 degrees fahrenheit.
Winter is chilly, with average lows at 39°f (3.9°c). Rain & snow in the east; A chilly air mass will overtake much of the eastern u.s. The lowest monthly average temperature in las vegas for january is 33 degrees.