September Weather in San Diego del Llanito, Mexico

Last updated: August 27, 2025

In September, the average temperature in San Diego del Llanito, Mexico hovers around 18°C (65°F). Expect a range with a minimum of 7°C (46°F) and a maximum of 29°C (85°F). This month also sees about 130 mm (5.1 in) of precipitation spread over 15 days, contributing to an average humidity level of 81%. Get ready for a mix of mild temperatures and some rainy days!

September Temperature in San Diego del Llanito

In September in San Diego del Llanito, the average temperature is 18°C (65°F). Maximums can reach 29°C (85°F), while minimums can drop to as low as 7°C (46°F). This mild climate makes San Diego del Llanito a comfortable destination for travelers looking to enjoy outdoor activities and explore the local sights.

September Weather in San Diego del Llanito: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Diego del Llanito, 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 del Llanito, September typically has an average temperature of 18°C (65°F), with highs reaching up to 29°C (85°F) and lows dropping to around 7°C (46°F).

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

September Precipitation in San Diego del Llanito

In San Diego del Llanito in September, the total precipitation amount is 130 mm (5.1 in) over the course of 15 days.

September Precipitation Trends in San Diego del Llanito

The chart displays monthly precipitation patterns in San Diego del Llanito, 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 del Llanito, September typically receives around 130 mm (5.1 inches) of precipitation spread over approximately 15 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 del Llanito

In San Diego del Llanito in September, humidity is 81%. With an average temperature of 18°C (65°F), this humidity feels like a thick blanket wrapping around you, making every step feel heavier and the air thick and sultry—a challenging environment for traveling.

September Average Humidity in San Diego del Llanito

This chart illustrates the average monthly humidity levels in San Diego del Llanito, 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 del Llanito 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 del Llanito

In San Diego del Llanito 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 del Llanito, you can check here.

Maximum UV Index Levels in San Diego del Llanito for September

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

Data source: San Diego del Llanito 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 del Llanito Compares to Other Months

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

This table compares monthly weather conditions in San Diego del Llanito, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (56°F)	5 mm (0.2 inches)	74%	very high
February Weather	16°C (60°F)	7 mm (0.3 inches)	65%	extreme
March Weather	18°C (65°F)	12 mm (0.5 inches)	58%	extreme
April Weather	20°C (69°F)	8 mm (0.3 inches)	58%	extreme
May Weather	22°C (71°F)	40 mm (1.6 inches)	67%	extreme
June Weather	20°C (69°F)	133 mm (5.3 inches)	76%	extreme
July Weather	19°C (67°F)	99 mm (3.9 inches)	67%	extreme
August Weather	20°C (68°F)	77 mm (3.0 inches)	68%	extreme
September Weather	18°C (65°F)	130 mm (5.1 inches)	81%	extreme
October Weather	17°C (63°F)	57 mm (2.2 inches)	83%	extreme
November Weather	15°C (59°F)	22 mm (0.9 inches)	84%	very high
December Weather	13°C (56°F)	6 mm (0.2 inches)	81%	very high