Weather in Phoenix in December
December in Phoenix is cool with average temperatures around 11.9°C (53.4°F). Light rainfall with only 31mm expected.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
18.6°C
65.5°F
Low
5.2°C
41.4°F
Precipitation
31 mm
1.2 inches
~4 rainy days
Conditions
Humidity
45%
Comparison to Adjacent Months
December is 5.8°C cooler than November.