September Weather in San Martin, Mexico

Last updated: August 27, 2025

The average temperature in San Martin, Mexico during September is a pleasant 23°C (74°F). Expect a minimum of 15°C (59°F) and a maximum of 36°C (98°F), making it a variable month. With an anticipated precipitation of 120 mm (4.7 in) spread over 19 days, it’s wise to be prepared for some rain. Additionally, the average humidity hovers around a comfortable 81%, ensuring a warm but manageable atmosphere.

September Temperature in San Martin

In September in San Martin, the average temperature is 23°C (74°F). The maximum can reach 36°C (98°F), while the minimum can be as low as 15°C (59°F). This pleasant climate makes it an ideal time for outdoor exploration and enjoying local attractions.

September Weather in San Martin: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Martin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Martin, September typically has an average temperature of 23°C (74°F), with highs reaching up to 36°C (98°F) and lows dropping to around 15°C (59°F).

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

September Precipitation in San Martin

In San Martin in September, the precipitation amount is 120 mm (4.7 in) over the course of 19 days.

September Precipitation Trends in San Martin

The chart displays monthly precipitation patterns in San Martin, 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 Martin, September typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 19 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 Martin

In San Martin in September, humidity is 81%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket draped over your skin, making travel feel a bit more sluggish and requiring plenty of water breaks to stay comfortable.

September Average Humidity in San Martin

This chart illustrates the average monthly humidity levels in San Martin, 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 Martin 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 Martin

In San Martin in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in San Martin.

Maximum UV Index Levels in San Martin for September

The chart shows the monthly maximum UV Index (UVI) for San Martin 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 Martin typically reaches 13, which falls under the extreme exposure category.

Data source: San Martin 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 Martin Compares to Other Months

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

This table compares monthly weather conditions in San Martin, 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)	16 mm (0.6 inches)	74%	very high
February Weather	18°C (64°F)	20 mm (0.8 inches)	65%	extreme
March Weather	20°C (69°F)	23 mm (0.9 inches)	58%	extreme
April Weather	23°C (74°F)	22 mm (0.8 inches)	58%	extreme
May Weather	25°C (77°F)	59 mm (2.3 inches)	67%	extreme
June Weather	25°C (76°F)	100 mm (4.0 inches)	76%	extreme
July Weather	24°C (76°F)	85 mm (3.3 inches)	67%	extreme
August Weather	24°C (76°F)	71 mm (2.8 inches)	68%	extreme
September Weather	23°C (74°F)	120 mm (4.7 inches)	81%	extreme
October Weather	21°C (70°F)	121 mm (4.8 inches)	83%	extreme
November Weather	18°C (65°F)	28 mm (1.1 inches)	84%	very high
December Weather	16°C (61°F)	12 mm (0.5 inches)	81%	high