December weather forecast and climate
Fontana, CA

What is the temperature in December in Fontana?

In Fontana, California, in December, the average high-temperature is 70°F (21.1°C), and the average low-temperature is 46°F (7.8°C).

How much does it rain in Fontana in December?

During December, Fontana regularly aggregates up to 1.6" (41.4mm) of precipitation.
Average temperature in December - Fontana, CA
  • Average high temperature in December: 70°F

The warmest month (with the highest average high temperature) is August (96°F).
The month with the lowest average high temperature is January (69°F).

  • Average low temperature in December: 46°F

The month with the highest average low temperature is August (64°F).
Coldest months (with the lowest average low temperature) are January and December (46°F).

Average rainfall in December - Fontana, CA
  • Average rainfall in December: 1.6"

Wettest months (with the highest rainfall) are January and March (3.5").
Driest months (with the lowest rainfall) are June and July (0").

Average daylight in December - Fontana, 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).