December weather forecast and climate
Lompoc, CA

Rows of a colorful flower garden and varying flower petal colors in a field in Lompoc, California
Rows of a colorful flower garden and varying flower petal colors in a field in Lompoc, California

Weather in December

December, the first month of the winter, in Lompoc, is also an enjoyable month, with temperature in the range of an average high of 61.3°F (16.3°C) and an average low of 50°F (10°C).

Temperature

The coldest month is December, with an average high-temperature of 61.3°F (16.3°C) and an average low-temperature of 50°F (10°C).

Humidity

In Lompoc, the average relative humidity is 65%.

Rainfall

In Lompoc, in December, during 5.6 rainfall days, 1.06" (27mm) of precipitation is typically accumulated. In Lompoc, during the entire year, the rain falls for 43.4 days and collects up to 7.09" (180mm) of precipitation.

Daylight

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

Sunshine

The average sunshine in Lompoc is 6.5h.

UV index

Months with the lowest UV index are January through April, November and December, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV radiation for average individuals.
Note: In December, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the coldest month in Lompoc?

The coldest month in Lompoc, California, is December, with an average high-temperature of 61.3°F (16.3°C) and an average low-temperature of 50°F (10°C).

What is the temperature in December in Lompoc?

The average high-temperature, in December, in Lompoc, California, is 61.3°F (16.3°C), while the average low-temperature is 50°F (10°C).

What is the average humidity in December in Lompoc?

In December, the average relative humidity in Lompoc is 65%.

How many days does it rain in December in Lompoc?

In Lompoc, California, in December, it is raining for 5.6 days, with typically 1.06" (27mm) of accumulated precipitation.

What is the month with the shortest days in Lompoc?

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

What is the average length of the day in December in Lompoc?

In December, the average length of the day in Lompoc is 9.9h.

How long on average sun shines in December in Lompoc?

In Lompoc, the average sunshine in December is 6.5h.

What is the month with the lowest UV index in Lompoc?

January through April, November and December, with an average maximum UV index of 4, are months with the lowest UV index.

How high is the UV index in December in Lompoc?

The average daily maximum UV index in December in Lompoc, California, is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from unprotected exposure to the UV radiation.

Average temperature in December
Lompoc, CA

Average temperature in December - Lompoc, CA
  • Average high temperature in December: 61.3°F

The warmest month (with the highest average high temperature) is September (74.7°F).
The month with the lowest average high temperature is December (61.3°F).

  • Average low temperature in December: 50°F

The month with the highest average low temperature is September (60.1°F).
The coldest month (with the lowest average low temperature) is February (49.1°F).

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Average pressure in December
Lompoc, CA

Average pressure in December - Lompoc, CA
  • Average pressure in December: 30.09"

The month with the highest atmospheric pressure is January (30.11").
Months with the lowest atmospheric pressure are June and September (29.91").

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Average wind speed in December
Lompoc, CA

Average wind speed in December - Lompoc, CA
  • Average wind speed in December: 8.4mph

The windiest month (with the highest average wind speed) is May (10.6mph).
The calmest month (with the lowest average wind speed) is January (7.9mph).

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Average humidity in December
Lompoc, CA

Average humidity in December - Lompoc, CA
  • Average humidity in December: 65%

Months with the highest relative humidity are June, July and August (71%).
The month with the lowest relative humidity is November (63%).

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Average rainfall in December
Lompoc, CA

Average rainfall in December - Lompoc, CA
  • Average rainfall in December: 1.06"

The wettest month (with the highest rainfall) is January (1.5").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in December
Lompoc, CA

Average rainfall days in December - Lompoc, CA
  • Average rainfall days in December: 5.6 days

The month with the highest number of rainy days is March (7.3 days).
The month with the least rainy days is June (1.2 days).

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

Average daylight in December / Average sunshine in December - Lompoc, CA
  • Average daylight in December: 9.9h

The month with the longest days is June (Average daylight: 14.5h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in December: 6.5h

Months with the most sunshine are June, July and August (Average sunshine: 11.9h).
The month with the least sunshine is February (Average sunshine: 6.4h).

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Average sunshine days in December
Lompoc, CA

Average sunshine days in December - Lompoc, CA
  • Average sunshine days in December: 24.9 days

The month with the most sunshine days is August (28.6 days).
The month with the least sunshine days is February (21.3 days).

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Average UV index in December
Lompoc, CA

Average UV index in December - Lompoc, CA
  • Average UV index in December: 4

The month with the highest UV index is August (UV index 6).
Months with the lowest UV index are January, February, March, April, November and December (UV index 4).

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Average cloud cover in December
Lompoc, CA

Average cloud cover in December - Lompoc, CA
  • Average cloud cover in December: 25

The month with the most cloud cover is March (Cloud cover 26).
The month with the least cloud cover is September (Cloud cover 9).

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Average visibility in December
Lompoc, CA

Average visibility in December - Lompoc, 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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