September Weather in Llano Grande, Mexico

Last updated: August 27, 2025

In September, the average temperature in Llano Grande, Mexico is a pleasant 22°C (73°F), with a minimum dipping to 17°C (64°F) and a warm maximum reaching 30°C (86°F). Be prepared for significant rainfall, as 501 mm (19.7 in) is expected over 29 days, contributing to an average humidity of 83%.

September Temperature in Llano Grande

In September in Llano Grande, the average temperature is 22°C (73°F). Maximums can reach 30°C (86°F) and minimums can be as low as 17°C (64°F). This makes it an ideal time for travelers to enjoy outdoor activities while experiencing pleasant weather.

September Weather in Llano Grande: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Llano Grande, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Llano Grande, September typically has an average temperature of 22°C (73°F), with highs reaching up to 30°C (86°F) and lows dropping to around 17°C (64°F).

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

September Precipitation in Llano Grande

In Llano Grande in September, the precipitation amount is 501 mm (19.7 in), distributed over the course of 29 days.

September Precipitation Trends in Llano Grande

The chart displays monthly precipitation patterns in Llano Grande, 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 Llano Grande, September typically receives around 501 mm (19.7 inches) of precipitation spread over approximately 29 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 Llano Grande

In Llano Grande in September, humidity is 83%. With an average temperature of 22°C (73°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities feel a bit more exhausting, yet the lush surroundings create a vibrant atmosphere perfect for exploring.

September Average Humidity in Llano Grande

This chart illustrates the average monthly humidity levels in Llano Grande, 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 Llano Grande is approximately 83%, 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 Llano Grande

In Llano Grande 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 Llano Grande.

Maximum UV Index Levels in Llano Grande for September

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

Data source: Llano Grande 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 Llano Grande Compares to Other Months

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

This table compares monthly weather conditions in Llano Grande, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	19°C (67°F)	17 mm (0.7 inches)	70%	very high
February Weather	20°C (68°F)	25 mm (1.0 inches)	65%	extreme
March Weather	21°C (70°F)	4 mm (0.2 inches)	59%	extreme
April Weather	21°C (71°F)	1 mm (0.0 inches)	60%	extreme
May Weather	23°C (73°F)	24 mm (0.9 inches)	67%	extreme
June Weather	23°C (74°F)	286 mm (11.3 inches)	80%	extreme
July Weather	23°C (73°F)	400 mm (15.7 inches)	81%	extreme
August Weather	23°C (73°F)	566 mm (22.3 inches)	83%	extreme
September Weather	22°C (73°F)	501 mm (19.7 inches)	83%	extreme
October Weather	22°C (73°F)	246 mm (9.7 inches)	80%	extreme
November Weather	21°C (70°F)	45 mm (1.8 inches)	77%	very high
December Weather	19°C (67°F)	14 mm (0.6 inches)	76%	very high