September Weather in Potrero, United States

Last updated: June 24, 2025

In September, the average temperature in Potrero, United States hovers around 23°C (73°F). Expect a range that can dip to a cool 8°C (47°F) and soar to a sweltering 43°C (110°F). With only 8 mm (0.3 in) of precipitation spread over 2 days, the weather is generally pleasant, complemented by an average humidity of 52%.

September Temperature in Potrero

In September in Potrero, the average temperature is 23°C (73°F). Maximums can reach 43°C (110°F), while minimums can dip as low as 8°C (47°F). Travelers should be prepared for warm days and cool nights, making it essential to pack accordingly.

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

The chart illustrates September temperature patterns in Potrero, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Potrero, September typically has an average temperature of 23°C (73°F), with highs reaching up to 43°C (110°F) and lows dropping to around 8°C (47°F).

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

September Precipitation in Potrero

In Potrero in September, the precipitation amount is 8 mm (0.3 in) over the course of 2 days.

September Precipitation Trends in Potrero

The chart displays monthly precipitation patterns in Potrero, 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 Potrero, September typically receives around 8 mm (0.3 inches) of precipitation spread over approximately 2 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 Potrero

In Potrero in September humidity is 52%. With an average temperature of 23°C (73°F), this humidity feels like a comfortable embrace, making it pleasant for traveling as you can enjoy outdoor activities without feeling overheated or sticky.

September Average Humidity in Potrero

This chart illustrates the average monthly humidity levels in Potrero, 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 Potrero 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 Potrero

In Potrero 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 Potrero.

Maximum UV Index Levels in Potrero for September

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

Data source: Potrero 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 Potrero Compares to Other Months

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

This table compares monthly weather conditions in Potrero, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (52°F)	52 mm (2.0 inches)	72%	moderate
February Weather	10°C (51°F)	68 mm (2.7 inches)	77%	high
March Weather	11°C (53°F)	58 mm (2.3 inches)	67%	very high
April Weather	15°C (59°F)	21 mm (0.8 inches)	56%	extreme
May Weather	16°C (62°F)	22 mm (0.9 inches)	46%	extreme
June Weather	21°C (70°F)	2 mm (0.1 inches)	48%	extreme
July Weather	25°C (76°F)	11 mm (0.4 inches)	46%	extreme
August Weather	25°C (77°F)	12 mm (0.5 inches)	42%	extreme
September Weather	23°C (73°F)	8 mm (0.3 inches)	52%	extreme
October Weather	19°C (66°F)	13 mm (0.5 inches)	58%	very high
November Weather	15°C (60°F)	24 mm (1.0 inches)	66%	high
December Weather	11°C (52°F)	53 mm (2.1 inches)	74%	moderate