September Weather in Brazoria, United States

Last updated: June 24, 2025

In September, the average temperature in Brazoria, United States hovers around 27°C (81°F), offering warmth that's perfect for outdoor exploration. However, temperatures can range from a cool 15°C (59°F) to a sweltering 35°C (95°F). Be prepared for 185 mm (7.3 in) of precipitation over approximately 18 days, and expect an average humidity of 73% to add a touch of tropical flair to your experience.

September Temperature in Brazoria

In September, in Brazoria, the average temperature is 27°C (81°F). Maximums can reach 35°C (95°F), and minimums can be as low as 15°C (59°F). This pleasant climate makes Brazoria an ideal destination for travelers seeking warmth and outdoor activities.

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

The chart illustrates September temperature patterns in Brazoria, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brazoria, 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 15°C (59°F).

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

September Precipitation in Brazoria

In Brazoria in September, the total precipitation amount is 185 mm (7.3 in) spread over 18 days.

September Precipitation Trends in Brazoria

The chart displays monthly precipitation patterns in Brazoria, 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 Brazoria, September typically receives around 185 mm (7.3 inches) of precipitation spread over approximately 18 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 Brazoria

In Brazoria in September, humidity is 73%. With an average temperature of 27°C (81°F), this humidity feels like a warm blanket enveloping you, making outdoor activities feel sticky and heavy, while also requiring frequent hydration breaks to stay comfortable during your travels.

September Average Humidity in Brazoria

This chart illustrates the average monthly humidity levels in Brazoria, 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 Brazoria is approximately 73%, 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 Brazoria

In Brazoria in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Brazoria.

Maximum UV Index Levels in Brazoria for September

The chart shows the monthly maximum UV Index (UVI) for Brazoria 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 Brazoria typically reaches 11, which falls under the extreme exposure category.

Data source: Brazoria 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 Brazoria Compares to Other Months

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

This table compares monthly weather conditions in Brazoria, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	14°C (57°F)	74 mm (2.9 inches)	78%	moderate
February Weather	15°C (60°F)	63 mm (2.5 inches)	81%	very high
March Weather	19°C (67°F)	67 mm (2.6 inches)	76%	very high
April Weather	22°C (72°F)	70 mm (2.7 inches)	79%	extreme
May Weather	26°C (78°F)	150 mm (5.9 inches)	79%	extreme
June Weather	28°C (83°F)	155 mm (6.1 inches)	74%	extreme
July Weather	29°C (84°F)	147 mm (5.8 inches)	71%	extreme
August Weather	29°C (84°F)	163 mm (6.4 inches)	68%	extreme
September Weather	27°C (81°F)	185 mm (7.3 inches)	73%	extreme
October Weather	23°C (74°F)	92 mm (3.6 inches)	75%	very high
November Weather	18°C (65°F)	76 mm (3.0 inches)	78%	high
December Weather	16°C (60°F)	85 mm (3.4 inches)	84%	moderate