September Weather in Brawley, United States

Last updated: June 24, 2025

In Brawley, United States, the average temperature in September reaches a sizzling 32°C (90°F). However, be prepared for extremes, as temperatures can drop to a cool 15°C (60°F) or soar to a sweltering 51°C (124°F). With an average humidity of 52% and minimal precipitation of just 6 mm (0.3 in) over 1 day, it’s important to stay hydrated and enjoy the sunshine!

September Temperature in Brawley

In September in Brawley, the average temperature is 32°C (90°F). Maximums can reach 51°C (124°F) while minimums can drop as low as 15°C (60°F). It's essential to prepare for the heat, but also be ready for cooler evenings during your travels.

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

The chart illustrates September temperature patterns in Brawley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brawley, September typically has an average temperature of 32°C (90°F), with highs reaching up to 51°C (124°F) and lows dropping to around 15°C (60°F).

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

September Precipitation in Brawley

In Brawley in September, the precipitation amount is 6 mm (0.3 in) over the course of 1 day.

September Precipitation Trends in Brawley

The chart displays monthly precipitation patterns in Brawley, 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 Brawley, September typically receives around 6 mm (0.3 inches) of precipitation spread over approximately 1 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 Brawley

In Brawley in September, humidity is 52%. With an average temperature of 32°C (90°F), this humidity feels like a warm, sticky embrace, making outdoor activities a bit challenging for travelers as the heat wraps around them, urging frequent breaks for hydration and shade.

September Average Humidity in Brawley

This chart illustrates the average monthly humidity levels in Brawley, 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 Brawley is approximately 52%, 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 Brawley

In Brawley 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 Brawley.

Maximum UV Index Levels in Brawley for September

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

Data source: Brawley 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 Brawley Compares to Other Months

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

This table compares monthly weather conditions in Brawley, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	15°C (59°F)	9 mm (0.3 inches)	72%	moderate
February Weather	16°C (62°F)	14 mm (0.5 inches)	77%	high
March Weather	20°C (68°F)	10 mm (0.4 inches)	67%	very high
April Weather	25°C (77°F)	3 mm (0.1 inches)	56%	very high
May Weather	27°C (82°F)	1 mm (0.0 inches)	46%	extreme
June Weather	33°C (92°F)	0 mm (0.0 inches)	48%	extreme
July Weather	36°C (98°F)	7 mm (0.3 inches)	46%	extreme
August Weather	36°C (98°F)	6 mm (0.2 inches)	42%	extreme
September Weather	32°C (90°F)	6 mm (0.3 inches)	52%	very high
October Weather	25°C (78°F)	3 mm (0.1 inches)	58%	high
November Weather	19°C (67°F)	5 mm (0.2 inches)	66%	moderate
December Weather	14°C (58°F)	10 mm (0.4 inches)	74%	moderate