December weather forecast and climate
Mount Hamilton, CA

Weather in December

The first month of the winter, December, is also a frosty month in Mount Hamilton, California, with average temperature ranging between max 48.9°F (9.4°C) and min 37°F (2.8°C).

Temperature

In December, the average high-temperature marginally drops, from a fresh 54.9°F (12.7°C) in November, to a frosty 48.9°F (9.4°C). In December, the average low-temperature is 37°F (2.8°C).

Rainfall

Throughout December, in Mount Hamilton, 4.04" (102.6mm) of precipitation is accumulated. During the entire year, Mount Hamilton aggregates up to 23.63" (600.2mm) of precipitation.

Snowfall

Months with snowfall in Mount Hamilton, California, are January through April, November and December. In Mount Hamilton, in December, 2.3" (58.4mm) of snow is typically accumulated. In Mount Hamilton, during the entire year, snow aggregates up to 17.7" (449.6mm).

Daylight

The month with the shortest days is December, with an average of 9.6h of daylight.
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FAQ

What is the temperature in December in Mount Hamilton?

The average high-temperature, in December, is 48.9°F (9.4°C), while the average low-temperature is 37°F (2.8°C).

How much does it rain in Mount Hamilton in December?

In Mount Hamilton, in December, 4.04" (102.6mm) of precipitation is typically accumulated.

How much does it snow in Mount Hamilton in December?

Throughout December, in Mount Hamilton, 2.3" (58.4mm) of snow is accumulated.

What is the month with the shortest days in Mount Hamilton?

December has the shortest days of the year in Mount Hamilton, with an average of 9.6h of daylight.

How many hours of daylight does Mount Hamilton have in December?

In Mount Hamilton, California, the average length of the day in December is 9.6h.

Average temperature in December
Mount Hamilton, CA

Average temperature in December - Mount Hamilton, CA
  • Average high temperature in December: 49°F

The warmest month (with the highest average high temperature) is July (78.7°F).
The month with the lowest average high temperature is January (48.5°F).

  • Average low temperature in December: 37.1°F

The month with the highest average low temperature is July (63.3°F).
The coldest months (with the lowest average low temperature) are February and March (36.7°F).

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Average rainfall in December
Mount Hamilton, CA

Average rainfall in December - Mount Hamilton, CA
  • Average rainfall in December: 4"

The wettest month (with the highest rainfall) is January (4.4").
The driest month (with the least rainfall) is July (0").

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Average snowfall in December
Mount Hamilton, CA

Average snowfall in December - Mount Hamilton, CA
  • Average snowfall in December: 2.3"

The month with the highest snowfall is January (5").
Months with the least snowfall are May, June, July, August, September and October (0").

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Average daylight in December
Mount Hamilton, CA

Average daylight in December - Mount Hamilton, CA
  • Average daylight in December: 9.6h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

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