Climate and monthly weather forecast
Mount Hamilton, CA

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Weather in January

January, like December, is a frosty winter month in Mount Hamilton, California, with temperature in the range of an average high of 48.6°F (9.2°C) and an average low of 36.9°F (2.7°C). Mount Hamilton's coldest month, January, registers temperatures that range from a high of 48.6°F (9.2°C) to a low of 36.9°F (2.7°C). Weather in January »

Weather in February

February, the last month of the winter in Mount Hamilton, is also a frosty month, with an average temperature ranging between max 48.9°F (9.4°C) and min 36.7°F (2.6°C). Mount Hamilton records a slight change with February's average high-temperatures adjusting to a still chilly 48.9°F (9.4°C) from January's 48.6°F (9.2°C). Weather in February »

Weather in March

March, the first month of the spring in Mount Hamilton, is a cool month, with an average temperature ranging between max 50.2°F (10.1°C) and min 36.7°F (2.6°C). As February transitions into March, Mount Hamilton records an average high-temperature of a cool 50.2°F (10.1°C), showing a gentle shift from the preceding month. Weather in March »

Weather in April

April, the same as March, is another fresh spring month in Mount Hamilton, California, with an average temperature ranging between max 55.2°F (12.9°C) and min 39.6°F (4.2°C). Mount Hamilton's April showcases an average high-temperature of a still cool 55.2°F (12.9°C), hardly distinct from March's 50.2°F (10.1°C). Weather in April »

Weather in May

May, the last month of the spring in Mount Hamilton, is an enjoyable month, with an average temperature fluctuating between 63.1°F (17.3°C) and 46.2°F (7.9°C). Mount Hamilton's May weather indicates a minor ascent in high-temperatures, adjusting from a cool 55.2°F (12.9°C) in April to a comfortable 63.1°F (17.3°C). Weather in May »

Weather in June

June, the first month of the summer in Mount Hamilton, is an agreeable month, with an average temperature ranging between max 71.4°F (21.9°C) and min 54.3°F (12.4°C). As May transitions into June, Mount Hamilton notices a gentle rise in the average high-temperature, transitioning from a comfortable 63.1°F (17.3°C) to a pleasant 71.4°F (21.9°C). Weather in June »

Weather in July

July is a moderately hot summer month in Mount Hamilton, California, with an average temperature varying between 78.6°F (25.9°C) and 63.3°F (17.4°C). Mount Hamilton's warmest month, July, generally records average temperatures ranging from a high of 78.6°F (25.9°C) to a low of 63.3°F (17.4°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Mount Hamilton, California, with an average temperature ranging between max 78.1°F (25.6°C) and min 62.4°F (16.9°C). August notes an average high-temperature of a still moderately hot 78.1°F (25.6°C), subtly differing from July's 78.6°F (25.9°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Mount Hamilton, California, with temperature in the range of an average low of 58.5°F (14.7°C) and an average high of 74.1°F (23.4°C). In September, Mount Hamilton experiences a minor shift in meteorological conditions with average high-temperatures marked at a still moderately hot 74.1°F (23.4°C), closely mirroring the climate in August. Weather in September »

Weather in October

October, the same as September, is another enjoyable autumn month in Mount Hamilton, California, with temperature in the range of an average low of 50.7°F (10.4°C) and an average high of 65.3°F (18.5°C). The transition to October results in a modest reduction in average high-temperature, moving from a warm 74.1°F (23.4°C) in September to a refreshing 65.3°F (18.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a fresh month in Mount Hamilton, California, with an average temperature fluctuating between 42.1°F (5.6°C) and 54.9°F (12.7°C). The transition into November involves a decrease in the average high-temperature, falling from a comfortable 65.3°F (18.5°C) in October to a cool 54.9°F (12.7°C). Weather in November »

Weather in December

The first month of the winter, December, is also a frosty month in Mount Hamilton, California, with an average temperature ranging between min 37°F (2.8°C) and max 48.9°F (9.4°C). The move into December indicates a slight reduction in the average high-temperature, down from November's fresh 54.9°F (12.7°C) to a frosty 48.9°F (9.4°C). Weather in December »
Updated: Feb 9, 2024 | Published by: Weather U.S. | Resources

Frequently asked questions

What month is the coldest in Mount Hamilton?

Mount Hamilton's coldest month, January, registers temperatures that range from a high of 48.6°F (9.2°C) to a low of 36.9°F (2.7°C).

What is the wettest month in Mount Hamilton?

January is the month with the most rainfall in Mount Hamilton, California, with 4.45" (113mm) of accumulated precipitation.

How much does it rain in Mount Hamilton?

During the entire year, Mount Hamilton aggregates up to 23.62" (600mm) of precipitation.

When does it snow in Mount Hamilton?

Months with snowfall in Mount Hamilton, California, are January through April, November and December.

When does it snow the most in Mount Hamilton?

January is the month with the most snowfall in Mount Hamilton, with 5" (127mm) of accumulated snow.

How much does it snow in Mount Hamilton?

Throughout the year, in Mount Hamilton, 17.72" (450mm) of snow is accumulated.

When is Daylight Saving Time (DST) in Mount Hamilton?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Mount Hamilton, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.

When it does not snow in Mount Hamilton?

May through October are months without snowfall in Mount Hamilton.

When are the longest days in Mount Hamilton?

With an average of 14h and 42min of daylight, June has the longest days of the year in Mount Hamilton.

What time of the year is the hottest in Mount Hamilton?

July is the month that records the highest temperatures, with averages ranging from a high of 78.6°F (25.9°C) to a low of 63.3°F (17.4°C).

What is the driest month in Mount Hamilton?

The month with the least rainfall in Mount Hamilton, California, is July, when 0.04" (1mm) of precipitation is typically aggregated.

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

With an average of 9h and 36min of daylight, December has the shortest days of the year in Mount Hamilton, California.

Average temperature
Mount Hamilton, CA

Average temperature - Mount Hamilton, CA

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).

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).

[Resources]

Average rainfall
Mount Hamilton, CA

Average rainfall - Mount Hamilton, CA

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

[Resources]

Average snowfall
Mount Hamilton, CA

Average snowfall - Mount Hamilton, CA

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

[Resources]

Average daylight
Mount Hamilton, CA

Average daylight - Mount Hamilton, CA

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).

[Resources]

Mount Hamilton, California, USA

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