September Weather in Belle Chasse, United States

Last updated: June 24, 2025

In September, the average temperature in Belle Chasse, United States is a warm 27°C (81°F), with temperatures ranging from a minimum of 17°C (63°F) to a maximum of 35°C (95°F). Expect 150 mm (5.9 in) of precipitation over 16 days, contributing to an average humidity of 79%. Embrace the warmth, but be prepared for the occasional shower!

September Temperature in Belle Chasse

In September in Belle Chasse, the average temperature is 27°C (81°F). Maximums can reach 35°C (95°F), and minimums can be as low as 17°C (63°F). This pleasant weather makes Belle Chasse an ideal destination for travelers seeking warm and comfortable conditions.

September Weather in Belle Chasse: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Belle Chasse, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Belle Chasse, September typically has an average temperature of 27°C (81°F), with highs reaching up to 35°C (95°F) and lows dropping to around 17°C (63°F).

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

September Precipitation in Belle Chasse

In Belle Chasse in September, the precipitation amount is 150 mm (5.9 in) spread over 16 days.

September Precipitation Trends in Belle Chasse

The chart displays monthly precipitation patterns in Belle Chasse, 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 Belle Chasse, September typically receives around 150 mm (5.9 inches) of precipitation spread over approximately 16 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 Belle Chasse

In Belle Chasse in September, humidity is 79%. With an average temperature of 27°C (81°F), this humidity feels like a warm and sticky embrace, making travel both challenging and invigorating as the air clings to your skin, urging you to seek shade or a refreshing drink.

September Average Humidity in Belle Chasse

This chart illustrates the average monthly humidity levels in Belle Chasse, 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 Belle Chasse is approximately 79%, 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 Belle Chasse

In Belle Chasse 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 Belle Chasse.

Maximum UV Index Levels in Belle Chasse for September

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

Data source: Belle Chasse 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 Belle Chasse Compares to Other Months

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

This table compares monthly weather conditions in Belle Chasse, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (56°F)	87 mm (3.4 inches)	81%	moderate
February Weather	16°C (61°F)	80 mm (3.2 inches)	81%	very high
March Weather	19°C (66°F)	78 mm (3.1 inches)	79%	very high
April Weather	21°C (70°F)	103 mm (4.0 inches)	81%	extreme
May Weather	25°C (77°F)	134 mm (5.3 inches)	77%	extreme
June Weather	28°C (82°F)	199 mm (7.8 inches)	74%	extreme
July Weather	28°C (83°F)	230 mm (9.1 inches)	74%	extreme
August Weather	28°C (83°F)	260 mm (10.2 inches)	73%	extreme
September Weather	27°C (81°F)	150 mm (5.9 inches)	79%	very high
October Weather	24°C (75°F)	125 mm (4.9 inches)	77%	very high
November Weather	17°C (63°F)	50 mm (2.0 inches)	81%	high
December Weather	15°C (59°F)	87 mm (3.4 inches)	84%	moderate