December weather forecast
Lompoc, CA

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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 an average temperature varying between 50°F (10°C) and 61.3°F (16.3°C).

Temperature

December, on average, is the coldest month, registering a high temperature of 61.3°F (16.3°C) and a low of 50°F (10°C).

Humidity

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

Rainfall

In Lompoc, California, during December, the rain falls for 5.6 days and regularly aggregates up to 1.06" (27mm) of precipitation. In Lompoc, during the entire year, the rain falls for 43.4 days and collects up to 7.09" (180mm) of precipitation.

Daylight

The month with the shortest days in Lompoc is December, with an average of 9h and 54min of daylight.
On the first day of the month, sunrise is at 6:51 am and sunset at 4:51 pm. On the last day of December, sunrise is at 7:08 am and sunset at 5:01 pm PST.

Sunshine

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

UV index

January through April, November and December, with an average maximum UV index of 4, are months with the lowest UV index in Lompoc. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index, 4 in December, converts into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
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Frequently asked questions

What month is the coldest in Lompoc?

December is the month when Lompoc experiences its coldest temperatures, averaging a high of 61.3°F (16.3°C) and a low of 50°F (10°C).

What are December temperatures in Lompoc?

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

What is the average humidity in December in Lompoc?

In December, the average relative humidity is 65%.

How much does it rain in Lompoc in December?

In Lompoc, California, during December, the rain falls for 5.6 days and regularly aggregates up to 1.06" (27mm) of precipitation.

What is the month with the shortest days in Lompoc?

The month with the shortest days in Lompoc, California, is December, with an average of 9h and 54min of daylight.

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

In December, the average day length in Lompoc is 9h and 53min.

When is the sunrise / sunset in December in Lompoc?

On the first day of December in Lompoc, sunrise is at 6:51 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:01 pm PST.

How many hours of sunshine does Lompoc have in December?

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

When is 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.

What is the UV index reading in December in Lompoc?

In Lompoc, California, the average daily maximum UV index in December is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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"Hg

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

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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%

The 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: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in December: 6h and 3min

The months with the most sunshine are June, July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 24min).

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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).
The 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

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

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Lompoc, California, USA

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