December heat: Las Vegas breaks daily heat record
Southern Nevada has moved beyond “unreasonable warmth” and into record-breaking territory, after Las Vegas officially hit 74 degrees Thursday, according to the National Weather Service.
In a post to X on Thursday, the weather service said the temperature broke the previous daily record of 72 degrees, set in 1939, and that it was still possible the city could climb another degree or two.
Las Vegas has officially reached 74 degrees. This breaks the previous daily record of 72 degrees set in 1939. It is still possible that we could jump another 1-2 degrees. The all-time December high temp is 78 degrees set on 12/2/1940. #nvwx #vegasweather
— NWS Las Vegas (@NWSVegas) December 11, 2025
The all-time December high in Las Vegas is 78 degrees, set on Dec. 2, 1940, the weather service noted.
Highs the rest of the week were still expected to run 10 to 15 degrees above normal, said Morgan Stessman, a meteorologist with the weather service, on Wednesday. Forecast highs remained in the low to mid-70s across most of the Las Vegas Valley, with overnight lows in the upper 40s to low 50s. The calm and unusually warm December pattern was “going to stick around” for perhaps the next two weeks, Stessman said.
