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September Weather in Llano Grande, Mexico

Last updated: August 27, 2025

In September, the average temperature in Llano Grande, Mexico hovers around 15°C (60°F), with temperatures ranging from a cool 7°C (45°F) to a warm 26°C (78°F). Expect 209 mm (8.2 in) of precipitation over approximately 23 days, contributing to the area's high average humidity of 83%. Prepare for a typically moist and mild climate!

September Temperature in Llano Grande

In September in Llano Grande, the average temperature is 15°C (60°F), with maximums reaching 26°C (78°F) and minimums dropping as low as 7°C (45°F). This comfortable climate makes it a great time for sightseeing and outdoor activities.

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 15°C (60°F), with highs reaching up to 26°C (78°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec464853576063616259585247
Data source: Temperature data for Llano Grande generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Llano Grande

In Llano Grande in September, the precipitation amount is 209 mm (8.2 in) accumulated over 23 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 209 mm (8.2 inches) of precipitation spread over approximately 23 days.
JanFebMarAprMayJunJulAugSepOctNovDec2434109261042481712091013038
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Llano Grande

In Llano Grande in September humidity is 83%. With an average temperature of 15°C (60°F), this humidity feels like a damp blanket wrapping around you, making travel a bit uncomfortable and sticky, as the air clings to your skin and dampens your clothes.

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.
JanFebMarAprMayJunJulAugSepOctNovDec74%66%61%56%61%73%82%83%83%79%77%78%
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.
JanFebMarAprMayJunJulAugSepOctNovDec811131515141414131298
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.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)24 mm (0.9 inches)74%very high
February Weather9°C (49°F)34 mm (1.3 inches)66%extreme
March Weather12°C (53°F)9 mm (0.4 inches)61%extreme
April Weather14°C (57°F)9 mm (0.3 inches)56%extreme
May Weather16°C (61°F)26 mm (1.0 inches)61%extreme
June Weather17°C (64°F)104 mm (4.1 inches)73%extreme
July Weather16°C (61°F)248 mm (9.8 inches)82%extreme
August Weather17°C (62°F)171 mm (6.7 inches)83%extreme
September Weather15°C (60°F)209 mm (8.2 inches)83%extreme
October Weather14°C (58°F)101 mm (4.0 inches)78%extreme
November Weather11°C (53°F)30 mm (1.2 inches)77%very high
December Weather8°C (47°F)38 mm (1.5 inches)78%very high

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