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September Weather in Santiago Tepeyahualco, Mexico

Last updated: August 27, 2025

In Santiago Tepeyahualco, Mexico, the average temperature in September hovers around 16°C (61°F). During this time, temperatures can dip to a chilly 6°C (42°F) or rise to a warm 25°C (78°F). Expect 170 mm (6.7 in) of precipitation spread over 22 days, contributing to an average humidity of 82%.

September Temperature in Santiago Tepeyahualco

In September in Santiago Tepeyahualco, the average temperature is 16°C (61°F). The maximum can reach 25°C (78°F), while the minimum can drop as low as 6°C (42°F). This makes Santiago Tepeyahualco a pleasant destination for travelers seeking mild weather and comfortable outdoor activities.

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

The chart illustrates September temperature patterns in Santiago Tepeyahualco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santiago Tepeyahualco, September typically has an average temperature of 16°C (61°F), with highs reaching up to 25°C (78°F) and lows dropping to around 6°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec545861636463616161595655
Data source: Temperature data for Santiago Tepeyahualco 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 Tepeyahualco

In Santiago Tepeyahualco in September, the precipitation amount is 170 mm (6.7 in) over the course of 22 days.

September Precipitation Trends in Santiago Tepeyahualco

The chart displays monthly precipitation patterns in Santiago Tepeyahualco, 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 Tepeyahualco, September typically receives around 170 mm (6.7 inches) of precipitation spread over approximately 22 days.
JanFebMarAprMayJunJulAugSepOctNovDec7720365815314316217084223
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Santiago Tepeyahualco

In Santiago Tepeyahualco in September humidity is 82%. With an average temperature of 16°C (61°F), this humidity feels like a heavy blanket enveloping you, making travel feel a bit sluggish and requiring frequent breaks to hydrate and cool down.

September Average Humidity in Santiago Tepeyahualco

This chart illustrates the average monthly humidity levels in Santiago Tepeyahualco, 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 Tepeyahualco is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%78%75%71%77%76%68%70%82%91%89%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Santiago Tepeyahualco

In Santiago Tepeyahualco 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 Santiago Tepeyahualco, you can check here.

Maximum UV Index Levels in Santiago Tepeyahualco for September

The chart shows the monthly maximum UV Index (UVI) for Santiago Tepeyahualco 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 Tepeyahualco typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10121415151514141412108
Data source: Santiago Tepeyahualco 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 Tepeyahualco Compares to Other Months

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

This table compares monthly weather conditions in Santiago Tepeyahualco, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)7 mm (0.3 inches)84%very high
February Weather14°C (58°F)7 mm (0.3 inches)78%extreme
March Weather16°C (62°F)20 mm (0.8 inches)75%extreme
April Weather17°C (64°F)36 mm (1.4 inches)70%extreme
May Weather18°C (65°F)58 mm (2.3 inches)77%extreme
June Weather17°C (63°F)153 mm (6.0 inches)76%extreme
July Weather16°C (61°F)143 mm (5.6 inches)68%extreme
August Weather16°C (61°F)161 mm (6.4 inches)70%extreme
September Weather16°C (61°F)170 mm (6.7 inches)82%extreme
October Weather15°C (59°F)83 mm (3.3 inches)91%extreme
November Weather13°C (56°F)22 mm (0.9 inches)89%very high
December Weather13°C (55°F)3 mm (0.1 inches)88%very high

Compare Santiago Tepeyahualco's Climate with Cities Worldwide