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

January 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
January, like December, in Fullerton, California, is another comfortable winter month, with average temperature fluctuating between 44.6°F (7°C) and 67.8°F (19.9°C).

Temperature

In January, the average high-temperature is practically the same as in December - a still comfortable 67.8°F (19.9°C). In January, the average low-temperature is 44.6°F (7°C).

Rainfall

In Fullerton, in January, 3" (77mm) of precipitation is typically accumulated. Throughout the year, in Fullerton, 13.9" (352.8mm) of rain is accumulated.

Daylight

In Fullerton, the average length of the day in January is 10.2h.

What is the temperature in January in Fullerton?

In January, in Fullerton, the average high-temperature is 67.8°F (19.9°C), and the average low-temperature is 44.6°F (7°C).

How much does it rain in Fullerton in January?

Throughout January, in Fullerton, California, 3" (77mm) of precipitation is accumulated.

What is the average length of the day in January in Fullerton?

In Fullerton, the average length of the day in January is 10.2h.
Average temperature in January - Fullerton, CA
  • Average high temperature in January: 67.8°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 January: 44.6°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 January - Fullerton, CA
  • Average rainfall in January: 3"

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

Average daylight in January - Fullerton, CA
  • Average daylight in January: 10.2h

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