Altadena
California, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Altadena, CA

The first month of the winter, December, is also an agreeable month in Altadena, California, with average temperature fluctuating between 68°F (20°C) and 44.1°F (6.7°C).

Temperature

In December, the average high-temperature marginally drops, from a warm 73.8°F (23.2°C) in November, to an agreeable 68°F (20°C). In Altadena, the average low-temperature is 44.1°F (6.7°C).

Rainfall

In December, the rain falls for 4.8 days. In Altadena, California, during the entire year, the rain falls for 43.8 days.

Daylight

The month with the shortest days is December, with an average of 9.9h of daylight.

What is the temperature in December in Altadena?

In December, in Altadena, the average high-temperature is 68°F (20°C), and the average low-temperature is 44.1°F (6.7°C).

How many days does it rain in December in Altadena?

In Altadena, during December, it is raining for 4.8 days.

What is the month with the shortest days in Altadena?

December has the shortest days of the year in Altadena, with an average of 9.9h of daylight.

How many hours of daylight does Altadena have in December?

In December, the average length of the day in Altadena is 9.9h.
Average temperature in December - Altadena, CA
  • Average high temperature in December: 68°F

The warmest month (with the highest average high temperature) is August (90.6°F).
The month with the lowest average high temperature is January (67.8°F).

  • Average low temperature in December: 44.1°F

The month with the highest average low temperature is August (62°F).
The coldest month (with the lowest average low temperature) is December (44.1°F).

Average rainfall days in December - Altadena, CA
  • Average rainfall days in December: 4.8 days

The month with the highest number of rainy days is March (7.7 days).
The month with the lowest number of rainy days is July (0.5 days).

Average daylight in December - Altadena, CA
  • Average daylight in December: 9.9h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).