September Weather in San Diego de Alejandria, Mexico

Last updated: August 27, 2025

In San Diego de Alejandria, Mexico, the average temperature for September hovers around 20°C (68°F), creating a pleasant climate for outdoor activities. Temperatures can dip to a brisk 11°C (52°F) or soar to a warm 31°C (87°F). Expect 157 mm (6.2 in) of precipitation over 18 days, contributing to an average humidity of 81%. Whether you're exploring or relaxing, be prepared for a mix of sunshine and showers!

September Temperature in San Diego de Alejandria

In September in San Diego de Alejandria, the average temperature is 20°C (68°F). Maximums can reach 31°C (87°F) and minimums can be as low as 11°C (52°F). This delightful weather makes it an ideal time for travelers to explore the outdoor attractions and enjoy the local culture.

September Weather in San Diego de Alejandria: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Diego de Alejandria, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Diego de Alejandria, September typically has an average temperature of 20°C (68°F), with highs reaching up to 31°C (87°F) and lows dropping to around 11°C (52°F).

Data source: Temperature data for San Diego de Alejandria generated using information from the Copernicus Climate Change Service.

September Precipitation in San Diego de Alejandria

In San Diego de Alejandria, in September, the precipitation amount is 157 mm (6.2 in) distributed over 18 days.

September Precipitation Trends in San Diego de Alejandria

The chart displays monthly precipitation patterns in San Diego de Alejandria, 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 San Diego de Alejandria, September typically receives around 157 mm (6.2 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 San Diego de Alejandria

In San Diego de Alejandria in September humidity is 81%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace that can make outdoor activities feel steamy and exhausting, potentially leading travelers to seek shade or a refreshing drink more often.

September Average Humidity in San Diego de Alejandria

This chart illustrates the average monthly humidity levels in San Diego de Alejandria, 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 San Diego de Alejandria is approximately 81%, 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 San Diego de Alejandria

In San Diego de Alejandria in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Diego de Alejandria, you can check here.

Maximum UV Index Levels in San Diego de Alejandria for September

The chart shows the monthly maximum UV Index (UVI) for San Diego de Alejandria 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 San Diego de Alejandria typically reaches 14, which falls under the extreme exposure category.

Data source: San Diego de Alejandria 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 San Diego de Alejandria Compares to Other Months

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

This table compares monthly weather conditions in San Diego de Alejandria, 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 (60°F)	8 mm (0.3 inches)	74%	very high
February Weather	17°C (64°F)	10 mm (0.4 inches)	65%	extreme
March Weather	21°C (69°F)	7 mm (0.3 inches)	58%	extreme
April Weather	22°C (73°F)	3 mm (0.1 inches)	58%	extreme
May Weather	24°C (75°F)	32 mm (1.2 inches)	67%	extreme
June Weather	22°C (72°F)	155 mm (6.1 inches)	76%	extreme
July Weather	20°C (68°F)	177 mm (7.0 inches)	67%	extreme
August Weather	20°C (69°F)	144 mm (5.6 inches)	68%	extreme
September Weather	20°C (68°F)	157 mm (6.2 inches)	81%	extreme
October Weather	19°C (67°F)	52 mm (2.1 inches)	83%	extreme
November Weather	17°C (63°F)	18 mm (0.7 inches)	84%	very high
December Weather	15°C (59°F)	6 mm (0.2 inches)	81%	very high