December weather forecast and climate
Livermore, CA

A path in the scenic hilly and forest landscape of the famous Lake Del Valle Regional Park in Livermore, California
A path in the scenic hilly and forest landscape of the famous Lake Del Valle Regional Park in Livermore, California

Weather in December

The first month of the winter, December, is still a cool month in Livermore, California, with average temperature fluctuating between 41.5°F (5.3°C) and 54.9°F (12.7°C).

Temperature

With an average high-temperature of 54.9°F (12.7°C) and an average low-temperature of 41.5°F (5.3°C), December is the coldest month.

Humidity

In December, the average relative humidity in Livermore is 71%.

Rainfall

In Livermore, California, it is raining for 9.9 days, with typically 1.85" (47mm) of accumulated precipitation. Throughout the year, in Livermore, there are 70.6 rainfall days, and 11.3" (287mm) of precipitation is accumulated.

Daylight

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

Sunshine

With an average of 6h of sunshine, December has the least sunshine of the year in Livermore.

UV index

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 3 transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the coldest month in Livermore?

December is the coldest month in Livermore, California, with an average high-temperature of 54.9°F (12.7°C) and an average low-temperature of 41.5°F (5.3°C).

What is the temperature in December in Livermore?

The average high-temperature, in December, in Livermore, California, is 54.9°F (12.7°C), while the average low-temperature is 41.5°F (5.3°C).

What is the average humidity in December in Livermore?

The average relative humidity in December is 71%.

How many days does it rain in December in Livermore?

In Livermore, California, in December, during 9.9 rainfall days, 1.85" (47mm) of precipitation is typically accumulated.

What is the month with the shortest days in Livermore?

With an average of 9.6h of daylight, December has the shortest days of the year in Livermore, California.

How many hours of daylight does Livermore have in December?

The average length of the day in December in Livermore, California, is 9.6h.

What is the month with the least sunshine in Livermore?

December has the least sunshine of the year in Livermore, California, with an average of 6h of sunshine.

How long on average sun shines in December in Livermore?

In Livermore, California, the average sunshine in December is 6h.

What are the months with the lowest UV index in Livermore?

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3.

What is the UV index reading in December in Livermore?

In December, the average daily maximum UV index in Livermore is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV rays.

Average temperature in December
Livermore, CA

Average temperature in December - Livermore, CA
  • Average high temperature in December: 54.9°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is December (54.9°F).

  • Average low temperature in December: 41.5°F

The month with the highest average low temperature is August (56.7°F).
The coldest month (with the lowest average low temperature) is January (41.4°F).

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Average pressure in December
Livermore, CA

Average pressure in December - Livermore, CA
  • Average pressure in December: 30.11"

The month with the highest atmospheric pressure is January (30.14").
Months with the lowest atmospheric pressure are June, August and September (29.92").

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Average wind speed in December
Livermore, CA

Average wind speed in December - Livermore, CA
  • Average wind speed in December: 4.6mph

The windiest months (with the highest average wind speed) are May and June (6.5mph).
The calmest month (with the lowest average wind speed) is November (4.2mph).

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Average humidity in December
Livermore, CA

Average humidity in December - Livermore, CA
  • Average humidity in December: 71%

The month with the highest relative humidity is March (74%).
Months with the lowest relative humidity are July and September (55%).

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Average rainfall in December
Livermore, CA

Average rainfall in December - Livermore, CA
  • Average rainfall in December: 1.85"

The wettest month (with the highest rainfall) is February (2.09").
The driest month (with the least rainfall) is August (0.04").

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Average rainfall days in December
Livermore, CA

Average rainfall days in December - Livermore, CA
  • Average rainfall days in December: 9.9 days

The month with the highest number of rainy days is March (12.7 days).
The month with the least rainy days is August (1.3 days).

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Average daylight in December /
Average sunshine in December
Livermore, CA

Average daylight in December / Average sunshine in December - Livermore, 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).

  • Average sunshine in December: 6h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6h).

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Average sunshine days in December
Livermore, CA

Average sunshine days in December - Livermore, CA
  • Average sunshine days in December: 20 days

The month with the most sunshine days is August (28.8 days).
The month with the least sunshine days is March (17.6 days).

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Average UV index in December
Livermore, CA

Average UV index in December - Livermore, CA
  • Average UV index in December: 3

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in December
Livermore, CA

Average cloud cover in December - Livermore, CA
  • Average cloud cover in December: 34

The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 5).

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Average visibility in December
Livermore, CA

Average visibility in December - Livermore, CA
  • Average visibility in December: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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