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September Weather in Santiaguillo, Mexico

Last updated: August 27, 2025

In September, the average temperature in Santiaguillo, Mexico is a pleasant 18°C (65°F). However, be prepared for a range as temperatures can dip to a minimum of 9°C (49°F) and rise to a maximum of 28°C (83°F). Expect about 119 mm (4.7 in) of precipitation spread over 17 days, contributing to an average humidity level of 86%. Ideal for those who enjoy a humid climate with occasional rain!

September Temperature in Santiaguillo

In September in Santiaguillo, the average temperature is 18°C (65°F). Maximums can reach 28°C (83°F) and minimums can be as low as 9°C (49°F). This mild weather makes Santiaguillo a perfect destination for travelers looking to enjoy comfortable outdoor activities.

September Weather in Santiaguillo: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Santiaguillo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santiaguillo, September typically has an average temperature of 18°C (65°F), with highs reaching up to 28°C (83°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec545864687171686865635954
Data source: Temperature data for Santiaguillo 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 Santiaguillo

In Santiaguillo in September, the precipitation amount is 119 mm (4.7 in) spread across 17 days.

September Precipitation Trends in Santiaguillo

The chart displays monthly precipitation patterns in Santiaguillo, 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 Santiaguillo, September typically receives around 119 mm (4.7 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec16957186912361119451510
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Santiaguillo

In Santiaguillo in September humidity is 86%. With an average temperature of 18°C (65°F), this humidity feels like you’re wrapped in a warm, heavy blanket, making outdoor activities feel quite muggy and sticky for traveling.

September Average Humidity in Santiaguillo

This chart illustrates the average monthly humidity levels in Santiaguillo, 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 Santiaguillo is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec71%64%49%47%55%77%82%83%86%83%80%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Santiaguillo

In Santiaguillo 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 Santiaguillo, you can check here.

Maximum UV Index Levels in Santiaguillo for September

The chart shows the monthly maximum UV Index (UVI) for Santiaguillo 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 Santiaguillo typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec8111315151414141412108
Data source: Santiaguillo 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 Santiaguillo Compares to Other Months

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

This table compares monthly weather conditions in Santiaguillo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)16 mm (0.6 inches)71%very high
February Weather15°C (59°F)9 mm (0.3 inches)64%extreme
March Weather18°C (64°F)5 mm (0.2 inches)49%extreme
April Weather20°C (68°F)7 mm (0.3 inches)47%extreme
May Weather22°C (72°F)18 mm (0.7 inches)55%extreme
June Weather22°C (71°F)69 mm (2.7 inches)77%extreme
July Weather20°C (69°F)123 mm (4.8 inches)82%extreme
August Weather20°C (69°F)61 mm (2.4 inches)83%extreme
September Weather18°C (65°F)119 mm (4.7 inches)86%extreme
October Weather17°C (64°F)45 mm (1.8 inches)83%extreme
November Weather15°C (59°F)15 mm (0.6 inches)80%very high
December Weather12°C (55°F)10 mm (0.4 inches)83%very high

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