Portal
Arizona, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Portal, AZ

The first month of the winter, December, is still a mild month in Portal, Arizona, with average temperature varying between 27.9°F (-2.3°C) and 56.5°F (13.6°C).

Temperature

In December, the average high-temperature marginally drops, from an enjoyable 64.4°F (18°C) in November, to a moderate 56.5°F (13.6°C). In December, the average low-temperature is 27.9°F (-2.3°C).

Rainfall

In Portal, it is raining for 4 days, with typically 1.4" (35.8mm) of accumulated precipitation. Throughout the year, in Portal, there are 57 rainfall days, and 17.4" (441.3mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. In Portal, 2.6" (66mm) of snow is typically accumulated. In Portal, during the entire year, snow aggregates up to 9.7" (246.3mm).

Daylight

The month with the shortest days is December, with an average of 10.1h of daylight.

What is the temperature in December in Portal?

In Portal, in December, the average high-temperature is 56.5°F (13.6°C), and the average low-temperature is 27.9°F (-2.3°C).

How many days does it rain in December in Portal?

In Portal, during December, the rain falls for 4 days and regularly aggregates up to 1.4" (35.8mm) of precipitation.

How much does it snow in Portal in December?

In Portal, in December, 2.6" (66mm) of snow is typically accumulated.

What is the month with the shortest days in Portal?

The month with the shortest days in Portal is December, with an average of 10.1h of daylight.

What is the average length of the day in December in Portal?

In Portal, Arizona, the average length of the day in December is 10.1h.
Average temperature in December - Portal, AZ
  • Average high temperature in December: 56.4°F

The warmest month (with the highest average high temperature) is June (90.7°F).
The month with the lowest average high temperature is January (55°F).

  • Average low temperature in December: 27.8°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (27.4°F).

Average rainfall in December - Portal, AZ
  • Average rainfall in December: 1.4"

The wettest month (with the highest rainfall) is August (3.7").
The driest month (with the lowest rainfall) is May (0.3").

Average rainfall days in December - Portal, AZ
  • Average rainfall days in December: 4 days

Months with the highest number of rainy days are July and August (10 days).
The month with the lowest number of rainy days is May (2 days).

Average snowfall in December - Portal, AZ
  • Average snowfall in December: 2.6"

The month with the highest snowfall is January (3.4").
Months with the lowest snowfall are May, June, July, August and September (0").

Average daylight in December - Portal, AZ
  • Average daylight in December: 10.1h

The month with the longest days is June (Average daylight: 14.2h).
The month with shortest days is December (Average daylight: 10.1h).