December Weather in Port Sulphur, United States

Last updated: June 24, 2025

In December, the average temperature in Port Sulphur, United States is a comfortable 16°C (61°F), with minimums dipping to 6°C (43°F) and maximums reaching 23°C (74°F). Expect 113 mm (4.4 in) of precipitation spread over 11 days, contributing to an average humidity of 83%.

December Temperature in Port Sulphur

In December in Port Sulphur, the average temperature is 16°C (61°F), with maximums reaching 23°C (74°F) and minimums dropping as low as 6°C (43°F). This pleasant climate makes Port Sulphur an ideal destination for travelers seeking comfortable weather for exploration and outdoor activities.

December Weather in Port Sulphur: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Port Sulphur, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Port Sulphur, December typically has an average temperature of 16°C (61°F), with highs reaching up to 23°C (74°F) and lows dropping to around 6°C (43°F).

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

December Precipitation in Port Sulphur

In Port Sulphur in December, the precipitation amount is 113 mm (4.4 in) over the course of 11 days.

December Precipitation Trends in Port Sulphur

The chart displays monthly precipitation patterns in Port Sulphur, 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 Port Sulphur, December typically receives around 113 mm (4.4 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 Port Sulphur

In Port Sulphur in December, humidity is 83%. With an average temperature of 16°C (61°F), this humidity feels like a warm, muggy blanket wrapping around you, making travel a bit sticky and potentially uncomfortable as you navigate through the sights.

December Average Humidity in Port Sulphur

This chart illustrates the average monthly humidity levels in Port Sulphur, 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 Port Sulphur is approximately 83%, 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 Port Sulphur

In Port Sulphur 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 Port Sulphur.

Maximum UV Index Levels in Port Sulphur for December

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

Data source: Port Sulphur 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 Port Sulphur Compares to Other Months

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

This table compares monthly weather conditions in Port Sulphur, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	14°C (57°F)	106 mm (4.2 inches)	80%	moderate
February Weather	16°C (61°F)	91 mm (3.6 inches)	79%	very high
March Weather	18°C (65°F)	69 mm (2.7 inches)	79%	very high
April Weather	21°C (70°F)	107 mm (4.2 inches)	80%	extreme
May Weather	25°C (77°F)	119 mm (4.7 inches)	74%	extreme
June Weather	27°C (81°F)	195 mm (7.7 inches)	72%	extreme
July Weather	28°C (83°F)	238 mm (9.4 inches)	75%	extreme
August Weather	28°C (83°F)	272 mm (10.7 inches)	74%	extreme
September Weather	27°C (81°F)	162 mm (6.4 inches)	79%	extreme
October Weather	24°C (76°F)	124 mm (4.9 inches)	77%	very high
November Weather	19°C (66°F)	52 mm (2.1 inches)	81%	high
December Weather	16°C (61°F)	113 mm (4.4 inches)	83%	moderate