December Weather in Phoenix

Last updated: March 2, 2024

The weather in Phoenix, United States, during December is characterized by an average temperature of 3°C (37°F). Highs can soar to 13°C (56°F), while lows may dip to -6°C (21°F). Typically, the humidity level in Phoenix throughout December hovers around 87%.

-6°C (21°F)

Minimum temperature

3°C (37°F)

Average temperature

13°C (56°F)

Maximum temperature

87%

Humidity

Precipitation and Sunshine hours

In December, Phoenix averages 106 mm (4.2 inches) of rainfall, typically over the course of 15 rainy days. The month enjoys an average of 9 hours 8 minutes of daylight, with the sun shining for approximately 4 hours 42 minutes each day. Additionally, there is a 24% probability of sunny days during this period.

106 mm (4.2 inches)

Precipitation

15 rainy days

Rainy days

4 hours 42 minutes

Sunshine hours

24%

Chance of sun

UV Index

In December, the UV Index in Phoenix reaches a maximum of 2, indicating a level of Low exposure. The most intense UV radiation typically occurs between 10:00 and 12:00, during which unprotected skin may burn in as little as 45 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00
UVI	0	1	1	2	2	2	2	2	1	1	0	0	0
Exposure	Low
Time to burn	45 min