Temperature for December
In Phoenix, AZ during December the average high temperature is 68.1°F. The hottest day on record was December 17, 1980 when the temperature hit 86.0°F.
Precipitation for December
In December the average monthly rainfall in Phoenix, AZ is 1.00 inches with rain usually falling on between 3 and 4 days. 1996 was the driest December with only 0.00 inches of rain falling, and 1994 was the wettest December with 3.46 inches of rain. The wettest single day in December was 18 December 1987 when 1.48 inches of rain fell.
In December it usually snows on between 0 and 1 days. In December there have been some years when thunderstorms have occurred, although there are other years when there hasn't been a thunderstorm in December.