December Weather in Westlake, United States

Last updated: June 24, 2025

In December, the average temperature in Westlake, United States hovers around 14°C (57°F), with a minimum dip of -3°C (27°F) and a maximum climb to 28°C (82°F). Expect a fair amount of rain, with 126 mm (5.0 in) of precipitation spread over 11 days. Plus, humidity levels are notably high, averaging at 88%. Be prepared for a mix of conditions!

December Temperature in Westlake

In December in Westlake, the average temperature is 14°C (57°F). Maximum temperatures can reach 28°C (82°F), while the minimum can drop as low as -3°C (27°F). Overall, travelers should prepare for a wide range of temperatures during this time.

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

The chart illustrates December temperature patterns in Westlake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Westlake, December typically has an average temperature of 14°C (57°F), with highs reaching up to 28°C (82°F) and lows dropping to around -3°C (27°F).

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

December Precipitation in Westlake

In Westlake in December, the total precipitation amount is 126 mm (5.0 in) spread over 11 days.

December Precipitation Trends in Westlake

The chart displays monthly precipitation patterns in Westlake, 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 Westlake, December typically receives around 126 mm (5.0 inches) of precipitation spread over approximately 11 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 Westlake

In Westlake in December humidity is 88%. With an average temperature of 14°C (57°F), this humidity feels like a thick blanket enveloping you, making every step feel heavier and giving a sense of stickiness that can drain your energy quickly while exploring.

December Average Humidity in Westlake

This chart illustrates the average monthly humidity levels in Westlake, 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 Westlake is approximately 88%, 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 Westlake

In Westlake in December, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Westlake.

Maximum UV Index Levels in Westlake for December

The chart shows the monthly maximum UV Index (UVI) for Westlake 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 Westlake typically reaches 5, which falls under the moderate exposure category.

Data source: Westlake 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 Westlake Compares to Other Months

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

This table compares monthly weather conditions in Westlake, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (53°F)	117 mm (4.6 inches)	81%	moderate
February Weather	14°C (58°F)	110 mm (4.3 inches)	81%	very high
March Weather	18°C (65°F)	78 mm (3.1 inches)	79%	very high
April Weather	20°C (69°F)	152 mm (6.0 inches)	80%	very high
May Weather	25°C (77°F)	206 mm (8.1 inches)	81%	extreme
June Weather	27°C (81°F)	168 mm (6.6 inches)	76%	extreme
July Weather	28°C (83°F)	159 mm (6.2 inches)	73%	extreme
August Weather	28°C (83°F)	182 mm (7.2 inches)	71%	extreme
September Weather	26°C (79°F)	174 mm (6.8 inches)	72%	very high
October Weather	22°C (72°F)	124 mm (4.9 inches)	73%	very high
November Weather	16°C (60°F)	71 mm (2.8 inches)	83%	high
December Weather	14°C (57°F)	126 mm (5.0 inches)	88%	moderate