September Weather in Sierra Madre, United States

Last updated: June 24, 2025

In September, the average temperature in Sierra Madre, United States hovers around 23°C (73°F). Expect daily variations with a minimum of 9°C (49°F) and soaring highs that can reach up to 43°C (109°F). Rainfall is light, with an average precipitation of just 6 mm (0.2 in) over 2 days, and the air maintains a comfortable humidity level of 48%.

September Temperature in Sierra Madre

In September in Sierra Madre, the average temperature is 23°C (73°F). Maximums can reach 43°C (109°F), and minimums can be as low as 9°C (49°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack accordingly for both warm days and cooler nights.

September Weather in Sierra Madre: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Sierra Madre, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sierra Madre, September typically has an average temperature of 23°C (73°F), with highs reaching up to 43°C (109°F) and lows dropping to around 9°C (49°F).

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

September Precipitation in Sierra Madre

In Sierra Madre in September, the precipitation amount is 6 mm (0.2 in) over the course of 2 days.

September Precipitation Trends in Sierra Madre

The chart displays monthly precipitation patterns in Sierra Madre, 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 Sierra Madre, September typically receives around 6 mm (0.2 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 Sierra Madre

In Sierra Madre in September humidity is 48%. With an average temperature of 23°C (73°F), this humidity feels like a pleasant embrace, making it comfortable for traveling while allowing you to enjoy outdoor activities without feeling overly sticky or weighed down.

September Average Humidity in Sierra Madre

This chart illustrates the average monthly humidity levels in Sierra Madre, 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 Sierra Madre is approximately 48%, 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 Sierra Madre

In Sierra Madre 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 Sierra Madre.

Maximum UV Index Levels in Sierra Madre for September

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

Data source: Sierra Madre 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 Sierra Madre Compares to Other Months

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

This table compares monthly weather conditions in Sierra Madre, 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 (51°F)	78 mm (3.1 inches)	78%	moderate
February Weather	11°C (52°F)	69 mm (2.7 inches)	82%	high
March Weather	12°C (54°F)	84 mm (3.3 inches)	75%	very high
April Weather	15°C (60°F)	24 mm (1.0 inches)	68%	very high
May Weather	17°C (63°F)	19 mm (0.7 inches)	57%	extreme
June Weather	21°C (71°F)	3 mm (0.1 inches)	52%	extreme
July Weather	25°C (77°F)	5 mm (0.2 inches)	46%	extreme
August Weather	25°C (77°F)	8 mm (0.3 inches)	39%	extreme
September Weather	23°C (73°F)	6 mm (0.2 inches)	48%	very high
October Weather	19°C (66°F)	10 mm (0.4 inches)	59%	high
November Weather	15°C (59°F)	25 mm (1.0 inches)	72%	moderate
December Weather	11°C (51°F)	77 mm (3.0 inches)	76%	moderate