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September Weather in Santiago Llano Grande, Mexico

Last updated: August 27, 2025

In September, the average temperature in Santiago Llano Grande, Mexico hovers around a warm 26°C (79°F). Expect minimums of 21°C (70°F) and maximums reaching 35°C (96°F). With an average humidity of 82%, it feels notably muggy. Prepare for moist conditions, as the region sees about 372 mm (14.7 in) of precipitation spread over 28 days.

September Temperature in Santiago Llano Grande

In September in Santiago Llano Grande, the average temperature is 26°C (79°F), with maximums reaching 35°C (96°F) and minimums dropping as low as 21°C (70°F). This pleasant climate makes Santiago Llano Grande an ideal destination for travelers seeking warmth and outdoor adventure.

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

The chart illustrates September temperature patterns in Santiago 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 Santiago Llano Grande, September typically has an average temperature of 26°C (79°F), with highs reaching up to 35°C (96°F) and lows dropping to around 21°C (70°F).
JanFebMarAprMayJunJulAugSepOctNovDec797981828380818079797979
Data source: Temperature data for Santiago 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 Santiago Llano Grande

In Santiago Llano Grande, in September, the precipitation amount is 372 mm (14.7 in) during 28 days.

September Precipitation Trends in Santiago Llano Grande

The chart displays monthly precipitation patterns in Santiago 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 Santiago Llano Grande, September typically receives around 372 mm (14.7 inches) of precipitation spread over approximately 28 days.
JanFebMarAprMayJunJulAugSepOctNovDec3122463411723083722712715
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Santiago Llano Grande

In Santiago Llano Grande in September, humidity is 82%. With an average temperature of 26°C (79°F), this humidity feels like a warm blanket that envelops you, making outdoor activities feel more taxing and requiring frequent breaks to stay hydrated.

September Average Humidity in Santiago Llano Grande

This chart illustrates the average monthly humidity levels in Santiago 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 Santiago Llano Grande is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec65%61%59%62%73%78%79%82%82%79%72%70%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Santiago Llano Grande

In Santiago 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 Santiago Llano Grande.

Maximum UV Index Levels in Santiago Llano Grande for September

The chart shows the monthly maximum UV Index (UVI) for Santiago 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 Santiago Llano Grande typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1011131314141313131198
Data source: Santiago 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 Santiago Llano Grande Compares to Other Months

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

This table compares monthly weather conditions in Santiago Llano Grande, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (79°F)3 mm (0.1 inches)65%very high
February Weather26°C (80°F)1 mm (0.0 inches)61%extreme
March Weather27°C (81°F)2 mm (0.1 inches)59%extreme
April Weather28°C (83°F)2 mm (0.1 inches)62%extreme
May Weather28°C (84°F)46 mm (1.8 inches)73%extreme
June Weather27°C (80°F)341 mm (13.4 inches)78%extreme
July Weather27°C (81°F)172 mm (6.8 inches)79%extreme
August Weather26°C (80°F)308 mm (12.1 inches)82%extreme
September Weather26°C (79°F)372 mm (14.7 inches)82%extreme
October Weather26°C (79°F)271 mm (10.7 inches)79%extreme
November Weather26°C (80°F)27 mm (1.1 inches)72%very high
December Weather26°C (79°F)15 mm (0.6 inches)70%very high

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