September Weather in Sulphur, United States

Last updated: June 24, 2025

In September, the average temperature in Sulphur, United States hovers around 26°C (79°F). Expect temperatures to vary, with a minimum of 14°C (57°F) and a maximum reaching 35°C (96°F). Rainfall is notable, with an average precipitation of 179 mm (7.1 in) spread over 15 days, contributing to an average humidity level of 72%.

September Temperature in Sulphur

In September in Sulphur, the average temperature is a pleasant 26°C (79°F). The maximum can reach 35°C (96°F), while the minimum can drop to as low as 14°C (57°F). Be prepared for warm days and cooler evenings, making it an ideal time for outdoor activities and sightseeing.

September Weather in Sulphur: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Sulphur, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sulphur, September typically has an average temperature of 26°C (79°F), with highs reaching up to 35°C (96°F) and lows dropping to around 14°C (57°F).

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

September Precipitation in Sulphur

In Sulphur in September, the precipitation amount is 179 mm (7.1 in), occurring over the course of 15 days.

September Precipitation Trends in Sulphur

The chart displays monthly precipitation patterns in Sulphur, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Sulphur, September typically receives around 179 mm (7.1 inches) of precipitation spread over approximately 15 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Sulphur

In Sulphur in September, humidity is 72%. With an average temperature of 26°C (79°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities feel a bit more strenuous but also adding a tropical charm to your travels.

September Average Humidity in Sulphur

This chart illustrates the average monthly humidity levels in Sulphur, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Sulphur is approximately 72%, offering insight into how humid the weather typically is during this month.

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

September UV Index in Sulphur

In Sulphur in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Sulphur.

Maximum UV Index Levels in Sulphur for September

The chart shows the monthly maximum UV Index (UVI) for Sulphur in September, 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 September, the maximum UV index in Sulphur typically reaches 10, which falls under the very high exposure category.

Data source: Sulphur September 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 September Weather in Sulphur Compares to Other Months

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

This table compares monthly weather conditions in Sulphur, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (53°F)	115 mm (4.5 inches)	81%	moderate
February Weather	14°C (58°F)	110 mm (4.3 inches)	81%	very high
March Weather	18°C (65°F)	81 mm (3.2 inches)	79%	very high
April Weather	20°C (69°F)	148 mm (5.8 inches)	80%	very high
May Weather	25°C (77°F)	222 mm (8.7 inches)	81%	extreme
June Weather	27°C (81°F)	178 mm (7.0 inches)	76%	extreme
July Weather	28°C (83°F)	159 mm (6.3 inches)	73%	extreme
August Weather	28°C (83°F)	199 mm (7.9 inches)	71%	extreme
September Weather	26°C (79°F)	179 mm (7.1 inches)	72%	very high
October Weather	22°C (72°F)	130 mm (5.1 inches)	73%	very high
November Weather	16°C (60°F)	69 mm (2.7 inches)	83%	high
December Weather	14°C (57°F)	137 mm (5.4 inches)	88%	moderate