September Weather in San Jose de Castellanos, Mexico

Last updated: August 27, 2025

In September, the average temperature in San Jose de Castellanos, Mexico is a comfortable 18°C (64°F), with minimum temperatures dipping to 8°C (47°F) and peaking at 28°C (82°F). Expect about 123 mm (4.8 in) of precipitation spread over 14 days, contributing to an average humidity of 81%, making it a rather humid month.

September Temperature in San Jose de Castellanos

In September in San Jose de Castellanos, the average temperature is 18°C (64°F). Maximums can reach 28°C (82°F), and minimums can drop to 8°C (47°F). This makes it a comfortable time to explore San Jose de Castellanos, so pack layers for both warm and cooler moments during your travels.

September Weather in San Jose de Castellanos: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Jose de Castellanos, 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 de Castellanos, September typically has an average temperature of 18°C (64°F), with highs reaching up to 28°C (82°F) and lows dropping to around 8°C (47°F).

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

September Precipitation in San Jose de Castellanos

In San Jose de Castellanos in September, the precipitation amount is 123 mm (4.8 in) over a span of 14 days.

September Precipitation Trends in San Jose de Castellanos

The chart displays monthly precipitation patterns in San Jose de Castellanos, 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 de Castellanos, September typically receives around 123 mm (4.8 inches) of precipitation spread over approximately 14 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 de Castellanos

In San Jose de Castellanos in September, humidity is 81%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making travel both refreshing and slightly stifling at the same time.

September Average Humidity in San Jose de Castellanos

This chart illustrates the average monthly humidity levels in San Jose de Castellanos, 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 de Castellanos 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 de Castellanos

In San Jose de Castellanos 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 de Castellanos, you can check here.

Maximum UV Index Levels in San Jose de Castellanos for September

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

Data source: San Jose de Castellanos 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 de Castellanos Compares to Other Months

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

This table compares monthly weather conditions in San Jose de Castellanos, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	9 mm (0.4 inches)	74%	very high
February Weather	14°C (58°F)	9 mm (0.3 inches)	65%	extreme
March Weather	17°C (63°F)	10 mm (0.4 inches)	58%	extreme
April Weather	19°C (67°F)	5 mm (0.2 inches)	58%	extreme
May Weather	21°C (69°F)	36 mm (1.4 inches)	67%	extreme
June Weather	20°C (68°F)	115 mm (4.5 inches)	76%	extreme
July Weather	19°C (66°F)	87 mm (3.4 inches)	67%	extreme
August Weather	19°C (66°F)	71 mm (2.8 inches)	68%	extreme
September Weather	18°C (64°F)	123 mm (4.8 inches)	81%	extreme
October Weather	17°C (62°F)	46 mm (1.8 inches)	83%	extreme
November Weather	14°C (58°F)	16 mm (0.6 inches)	84%	very high
December Weather	12°C (54°F)	8 mm (0.3 inches)	81%	very high