September Weather in San Jose del Rio, Mexico

Last updated: August 27, 2025

In September, the average temperature in San Jose del Rio, Mexico is a pleasant 19°C (67°F). Expect a range from a cool 9°C (48°F) to a warm 30°C (86°F). During this month, the region sees an average precipitation of 121 mm (4.7 in) over 15 days, contributing to a relatively high humidity level of 81%. Be sure to plan accordingly for both sun and rain!

September Temperature in San Jose del Rio

In September in San Jose del Rio, the average temperature is 19°C (67°F). The maximum can reach 30°C (86°F), while the minimum can drop to as low as 9°C (48°F). This makes it an ideal time for traveling, as you can enjoy pleasant weather and explore the area comfortably.

September Weather in San Jose del Rio: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Jose del Rio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Jose del Rio, September typically has an average temperature of 19°C (67°F), with highs reaching up to 30°C (86°F) and lows dropping to around 9°C (48°F).

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

September Precipitation in San Jose del Rio

In San Jose del Rio in September, the precipitation amount is 121 mm (4.7 in) over a period of 15 days.

September Precipitation Trends in San Jose del Rio

The chart displays monthly precipitation patterns in San Jose del Rio, 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 Jose del Rio, September typically receives around 121 mm (4.7 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 Jose del Rio

In San Jose del Rio in September humidity is 81%. With an average temperature of 19°C (67°F), this humidity feels like a heavy blanket enveloping you, making travel somewhat uncomfortable as sweat clings to your skin and the air feels thick, prompting you to seek shade and hydration frequently.

September Average Humidity in San Jose del Rio

This chart illustrates the average monthly humidity levels in San Jose del Rio, 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 Jose del Rio 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 Jose del Rio

In San Jose del Rio 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 Jose del Rio, you can check here.

Maximum UV Index Levels in San Jose del Rio for September

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

Data source: San Jose del Rio 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 Jose del Rio Compares to Other Months

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

This table compares monthly weather conditions in San Jose del Rio, 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)	11 mm (0.4 inches)	74%	very high
February Weather	16°C (60°F)	9 mm (0.4 inches)	65%	extreme
March Weather	19°C (66°F)	5 mm (0.2 inches)	58%	extreme
April Weather	20°C (69°F)	3 mm (0.1 inches)	58%	extreme
May Weather	22°C (72°F)	25 mm (1.0 inches)	67%	extreme
June Weather	21°C (71°F)	111 mm (4.4 inches)	76%	extreme
July Weather	20°C (68°F)	122 mm (4.8 inches)	67%	extreme
August Weather	20°C (69°F)	93 mm (3.7 inches)	68%	extreme
September Weather	19°C (67°F)	121 mm (4.7 inches)	81%	extreme
October Weather	18°C (65°F)	44 mm (1.7 inches)	83%	extreme
November Weather	16°C (61°F)	12 mm (0.5 inches)	84%	very high
December Weather	13°C (57°F)	7 mm (0.3 inches)	81%	very high