Las Vegas Weather In December 2025. In las vegas, during december, the rain falls for 5.1 days and regularly aggregates up to 0.67 (17mm) of precipitation. It features all historical weather data series we have available, including the las vegas temperature history for 2025.

The forecast for the first days of december 2025 in las vegas predicts a temperature of 63 °f, which is slightly above. Expect 14°c daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in las vegas in december.