December Weather in Lompoc, United States

Last updated: June 24, 2025

In December, the average temperature in Lompoc, United States is a comfortable 13°C (56°F). During this time, you can expect temperatures to range from a cool 7°C (45°F) to a pleasant 23°C (73°F). With 70 mm (2.7 in) of precipitation over 6 days, it's wise to keep an umbrella handy. Plus, the air tends to be quite moist, with an average humidity of 76%.

December Temperature in Lompoc

In December in Lompoc, the average temperature is 13°C (56°F). Maximums can reach 23°C (73°F) and minimums can be as low as 7°C (45°F). This mild climate makes it an ideal time for outdoor activities and sightseeing.

December Weather in Lompoc: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Lompoc, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lompoc, December typically has an average temperature of 13°C (56°F), with highs reaching up to 23°C (73°F) and lows dropping to around 7°C (45°F).

Data source: Temperature data for Lompoc generated using information from the Copernicus Climate Change Service.

December Precipitation in Lompoc

In Lompoc in December, the total precipitation amount is 70 mm (2.7 in), occurring over the span of 6 days.

December Precipitation Trends in Lompoc

The chart displays monthly precipitation patterns in Lompoc, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Lompoc, December typically receives around 70 mm (2.7 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Lompoc

In Lompoc in December humidity is 76%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket enveloping you, making travel a bit uncomfortable as you navigate through the heavy, moisture-laden air.

December Average Humidity in Lompoc

This chart illustrates the average monthly humidity levels in Lompoc, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Lompoc is approximately 76%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Lompoc

In Lompoc in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Lompoc, you can check the information here.

Maximum UV Index Levels in Lompoc for December

The chart shows the monthly maximum UV Index (UVI) for Lompoc in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Lompoc typically reaches 3, which falls under the moderate exposure category.

Data source: Lompoc December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How December Weather in Lompoc Compares to Other Months

Weather in Lompoc varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Lompoc, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Lompoc, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (55°F)	92 mm (3.6 inches)	80%	moderate
February Weather	12°C (54°F)	72 mm (2.8 inches)	83%	high
March Weather	13°C (55°F)	82 mm (3.2 inches)	80%	very high
April Weather	13°C (56°F)	21 mm (0.8 inches)	76%	very high
May Weather	14°C (57°F)	10 mm (0.4 inches)	75%	extreme
June Weather	15°C (60°F)	1 mm (0.1 inches)	74%	extreme
July Weather	16°C (62°F)	1 mm (0.0 inches)	75%	extreme
August Weather	17°C (63°F)	1 mm (0.1 inches)	72%	extreme
September Weather	17°C (63°F)	1 mm (0.1 inches)	70%	very high
October Weather	17°C (63°F)	10 mm (0.4 inches)	70%	high
November Weather	15°C (59°F)	28 mm (1.1 inches)	74%	moderate
December Weather	13°C (56°F)	70 mm (2.7 inches)	76%	moderate