December Weather in Weslaco, United States

Last updated: June 24, 2025

In December, the average temperature in Weslaco, United States hovers around 18°C (65°F), providing a pleasant climate. Visitors can expect a comfortable minimum of 1°C (34°F) and a warm maximum of 34°C (93°F). The region receives about 22 mm (0.8 in) of precipitation over 3 days, contributing to an average humidity of 86%, which adds a touch of tropical feel to the air. Enjoy the diverse weather conditions as you explore this captivating locale!

December Temperature in Weslaco

In December in Weslaco, the average temperature is 18°C (65°F). The maximum can reach 34°C (93°F), and the minimum can be as low as 1°C (34°F). This temperature range makes Weslaco an ideal destination for travelers looking to enjoy a variety of outdoor activities.

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

The chart illustrates December temperature patterns in Weslaco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Weslaco, December typically has an average temperature of 18°C (65°F), with highs reaching up to 34°C (93°F) and lows dropping to around 1°C (34°F).

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

December Precipitation in Weslaco

In Weslaco in December, the total precipitation amount is 22 mm (0.8 in) over the course of 3 days.

December Precipitation Trends in Weslaco

The chart displays monthly precipitation patterns in Weslaco, 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 Weslaco, December typically receives around 22 mm (0.8 inches) of precipitation spread over approximately 3 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 Weslaco

In Weslaco in December humidity is 86%. With an average temperature of 18°C (65°F), this humidity feels like you’re wrapped in a warm, heavy blanket, making outdoor activities feel quite muggy and sticky for traveling.

December Average Humidity in Weslaco

This chart illustrates the average monthly humidity levels in Weslaco, 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 Weslaco 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 Weslaco

In Weslaco in December, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Weslaco, you can refer to this Hourly UV Index in Weslaco.

Maximum UV Index Levels in Weslaco for December

The chart shows the monthly maximum UV Index (UVI) for Weslaco 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 Weslaco typically reaches 6, which falls under the high exposure category.

Data source: Weslaco 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 Weslaco Compares to Other Months

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

This table compares monthly weather conditions in Weslaco, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	17°C (62°F)	22 mm (0.9 inches)	83%	high
February Weather	18°C (65°F)	22 mm (0.9 inches)	79%	very high
March Weather	22°C (72°F)	32 mm (1.2 inches)	76%	very high
April Weather	25°C (77°F)	30 mm (1.2 inches)	77%	extreme
May Weather	28°C (82°F)	86 mm (3.4 inches)	80%	extreme
June Weather	29°C (85°F)	87 mm (3.4 inches)	73%	extreme
July Weather	30°C (86°F)	97 mm (3.8 inches)	66%	extreme
August Weather	31°C (88°F)	28 mm (1.1 inches)	65%	extreme
September Weather	29°C (84°F)	101 mm (4.0 inches)	73%	extreme
October Weather	25°C (77°F)	58 mm (2.3 inches)	76%	very high
November Weather	21°C (69°F)	30 mm (1.2 inches)	80%	high
December Weather	18°C (65°F)	22 mm (0.8 inches)	86%	high