Weather in December
December, the first month of the winter in Mount Hamilton, is also a frosty month, with an average temperature fluctuating between 37°F (2.8°C) and 48.9°F (9.4°C).
On the first day of December, sunrise is at 7:02 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:59 pm PST.
Temperature
A mild drop in Mount Hamilton's average high-temperature is observed in December, transitioning from a fresh 54.9°F (12.7°C) in November to a frosty 48.9°F (9.4°C). Mount Hamilton observes an average nighttime low-temperature of 37°F (2.8°C) during the month of December.Rainfall
Throughout December, 4.06" (103mm) of precipitation is accumulated. During the entire year, Mount Hamilton aggregates up to 23.62" (600mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. During December, Mount Hamilton regularly aggregates up to 2.28" (58mm) of snow. In Mount Hamilton, during the entire year, snow aggregates up to 17.72" (450mm).Daylight
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 7:02 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:59 pm PST.
Updated: Aug 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Mount Hamilton in December?
In Mount Hamilton, in December, the average high-temperature is 48.9°F (9.4°C), and the average low-temperature is 37°F (2.8°C).
How much does it rain in December?
During December, Mount Hamilton regularly aggregates up to 4.06" (103mm) of precipitation.
How much does it snow in December?
In Mount Hamilton, in December, 2.28" (58mm) of snow is typically accumulated.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 36min of daylight.
How many hours of daylight does Mount Hamilton have in December?
The average day length in December is 9h and 38min.
When is the sunrise / sunset in December?
In December, on the first day of the month, sunrise is at 7:02 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:59 pm PST.
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).
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").
Average snowfall in December
Mount Hamilton, CA
- Average snowfall in December: 2.3"
The month with the highest snowfall is January (5").
The months with the least snowfall are May, June, July, August, September and October (0").
Average daylight in December
Mount Hamilton, CA
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
Mount Hamilton, California, USA
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