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

December weather forecast and climate
Fullerton, CA

A scenic view of the trees and neat lawns of the famous Muckenthaler Community Center in Fullerton, California
A scenic view of the trees and neat lawns of the famous Muckenthaler Community Center in Fullerton, California
The first month of the winter, December, is still a comfortable month in Fullerton, California, with average temperature ranging between min 44.8°F (7.1°C) and max 67.5°F (19.7°C).

Temperature

December is the coldest month, with an average high-temperature of 67.5°F (19.7°C) and an average low-temperature of 44.8°F (7.1°C).

Rainfall

During December, Fullerton regularly aggregates up to 2.1" (52.1mm) of precipitation. Throughout the year, in Fullerton, 13.9" (352.8mm) of rain is accumulated.

Daylight

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

What is the coldest month in Fullerton?

December is the coldest month, with an average high-temperature of 67.5°F (19.7°C) and an average low-temperature of 44.8°F (7.1°C).

What is the temperature in December in Fullerton?

In December, in Fullerton, California, the average high-temperature is 67.5°F (19.7°C), and the average low-temperature is 44.8°F (7.1°C).

How much does it rain in Fullerton in December?

In Fullerton, in December, 2.1" (52.1mm) of precipitation is typically accumulated.

What is the month with the shortest days in Fullerton?

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

How many hours of daylight does Fullerton have in December?

In Fullerton, the average length of the day in December is 9.9h.
Average temperature in December - Fullerton, CA
  • Average high temperature in December: 67.4°F

The warmest month (with the highest average high temperature) is August (85.4°F).
The month with the lowest average high temperature is December (67.4°F).

  • Average low temperature in December: 44.8°F

The month with the highest average low temperature is August (65.3°F).
The coldest month (with the lowest average low temperature) is January (44.6°F).

Average rainfall in December - Fullerton, CA
  • Average rainfall in December: 2.1"

The wettest month (with the highest rainfall) is February (3.3").
The driest month (with the lowest rainfall) is July (0").

Average daylight in December - Fullerton, 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).