December Weather in Boerne, United States

Last updated: June 24, 2025

In Boerne, United States, the average temperature in December hovers around 12°C (54°F). During this month, temperatures can dip as low as -4°C (25°F) or rise to a warm 28°C (83°F). Expect 53 mm (2.1 in) of precipitation over about 7 days, and be prepared for a high average humidity of 86%, creating a moist atmosphere throughout the month.

December Temperature in Boerne

In December in Boerne, the average temperature is 12°C (54°F). Maximum temperatures can reach 28°C (83°F), while minimums can drop as low as -4°C (25°F). This variation makes Boerne a destination where travelers should be prepared for both warm days and chilly nights.

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

The chart illustrates December temperature patterns in Boerne, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boerne, December typically has an average temperature of 12°C (54°F), with highs reaching up to 28°C (83°F) and lows dropping to around -4°C (25°F).

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

December Precipitation in Boerne

In Boerne in December, the total precipitation amount is 53 mm (2.1 in) spread over a period of 7 days.

December Precipitation Trends in Boerne

The chart displays monthly precipitation patterns in Boerne, 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 Boerne, December typically receives around 53 mm (2.1 inches) of precipitation spread over approximately 7 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 Boerne

In Boerne in December, humidity is 86%. With an average temperature of 12°C (54°F), this humidity feels like a damp blanket wrapping around you, making outdoor activities uncomfortable and travel challenging due to the heavy, muggy atmosphere.

December Average Humidity in Boerne

This chart illustrates the average monthly humidity levels in Boerne, 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 Boerne is approximately 86%, 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 Boerne

In Boerne 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 Boerne.

Maximum UV Index Levels in Boerne for December

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

Data source: Boerne 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 Boerne Compares to Other Months

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

This table compares monthly weather conditions in Boerne, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (51°F)	45 mm (1.8 inches)	79%	moderate
February Weather	12°C (53°F)	57 mm (2.3 inches)	79%	very high
March Weather	17°C (63°F)	65 mm (2.6 inches)	74%	very high
April Weather	20°C (68°F)	75 mm (2.9 inches)	76%	extreme
May Weather	24°C (75°F)	135 mm (5.3 inches)	81%	extreme
June Weather	27°C (81°F)	84 mm (3.3 inches)	76%	extreme
July Weather	28°C (83°F)	58 mm (2.3 inches)	66%	extreme
August Weather	29°C (84°F)	58 mm (2.3 inches)	58%	extreme
September Weather	26°C (78°F)	118 mm (4.7 inches)	65%	extreme
October Weather	21°C (70°F)	84 mm (3.3 inches)	74%	very high
November Weather	15°C (59°F)	40 mm (1.6 inches)	81%	high
December Weather	12°C (54°F)	53 mm (2.1 inches)	86%	moderate