San Bernardino
California, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
San Bernardino, CA

Scenic settlement spot on the foot of the iconic San Bernardino Mountains in California, with a view of the snow peaks of the San Gorgiono mountains
Scenic settlement spot on the foot of the iconic San Bernardino Mountains in California, with a view of the snow peaks of the San Gorgiono mountains
December, the first month of the winter, in San Bernardino, is still a comfortable month, with average temperature fluctuating between 67.1°F (19.5°C) and 41.2°F (5.1°C).

Temperature

December is the coldest month, with an average high-temperature of 67.1°F (19.5°C) and an average low-temperature of 41.2°F (5.1°C).

Rainfall

In San Bernardino, during December, the rain falls for 4.8 days and regularly aggregates up to 2.4" (61.2mm) of precipitation. Throughout the year, in San Bernardino, California, there are 38.3 rainfall days, and 16" (406.8mm) of precipitation is accumulated.

Daylight

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

What is the coldest month in San Bernardino?

The coldest month is December, with an average high-temperature of 67.1°F (19.5°C) and an average low-temperature of 41.2°F (5.1°C).

What is the temperature in December in San Bernardino?

The average high-temperature, in December, in San Bernardino, California, is 67.1°F (19.5°C), while the average low-temperature is 41.2°F (5.1°C).

How many days does it rain in December in San Bernardino?

In San Bernardino, California, during December, the rain falls for 4.8 days and regularly aggregates up to 2.4" (61.2mm) of precipitation.

What is the month with the shortest days in San Bernardino?

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

How many hours of daylight does San Bernardino have in December?

The average length of the day in December in San Bernardino, California, is 9.9h.
Average temperature in December - San Bernardino, CA
  • Average high temperature in December: 67.1°F

The warmest month (with the highest average high temperature) is August (97.3°F).
The month with the lowest average high temperature is December (67.1°F).

  • Average low temperature in December: 41.1°F

The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is December (41.1°F).

Average rainfall in December - San Bernardino, CA
  • Average rainfall in December: 2.4"

The wettest month (with the highest rainfall) is February (4.1").
The driest month (with the lowest rainfall) is July (0").

Average rainfall days in December - San Bernardino, CA
  • Average rainfall days in December: 4.8 days

The month with the highest number of rainy days is February (7.2 days).
Months with the lowest number of rainy days are July and August (0.5 days).

Average daylight in December - San Bernardino, 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).