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September Weather in San Mateo Etlatongo, Mexico

Last updated: August 27, 2025

In September, the average temperature in San Mateo Etlatongo, Mexico is a pleasant 16°C (62°F). Expect temperatures to range from a cool 9°C (49°F) to a warm 25°C (78°F). It's also the time of year when the region experiences 275 mm (10.8 in) of precipitation over approximately 24 days, contributing to an average humidity of 84%. So, be prepared for a mix of mild temperatures and a fair share of rainfall!

September Temperature in San Mateo Etlatongo

In September in San Mateo Etlatongo, the average temperature is 16°C (62°F). Maximums can reach 25°C (78°F), and minimums can be as low as 9°C (49°F). This pleasant climate makes San Mateo Etlatongo an ideal destination for travelers seeking mild weather and outdoor adventures.

September Weather in San Mateo Etlatongo: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Mateo Etlatongo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Mateo Etlatongo, September typically has an average temperature of 16°C (62°F), with highs reaching up to 25°C (78°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec565962646563616162605756
Data source: Temperature data for San Mateo Etlatongo 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 San Mateo Etlatongo

In San Mateo Etlatongo in September, the total precipitation amount is 275 mm (10.8 in) over the course of 24 days.

September Precipitation Trends in San Mateo Etlatongo

The chart displays monthly precipitation patterns in San Mateo Etlatongo, 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 San Mateo Etlatongo, September typically receives around 275 mm (10.8 inches) of precipitation spread over approximately 24 days.
JanFebMarAprMayJunJulAugSepOctNovDec126186297293134225275127257
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Mateo Etlatongo

In San Mateo Etlatongo in September, humidity is 84%. With an average temperature of 16°C (62°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities a bit sticky, but with the right gear, you can still explore comfortably.

September Average Humidity in San Mateo Etlatongo

This chart illustrates the average monthly humidity levels in San Mateo Etlatongo, 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 San Mateo Etlatongo is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%80%73%67%72%73%76%80%84%89%88%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Mateo Etlatongo

In San Mateo Etlatongo 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 San Mateo Etlatongo, you can check here.

Maximum UV Index Levels in San Mateo Etlatongo for September

The chart shows the monthly maximum UV Index (UVI) for San Mateo Etlatongo 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 San Mateo Etlatongo typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10131415151515141413119
Data source: San Mateo Etlatongo 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 San Mateo Etlatongo Compares to Other Months

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

This table compares monthly weather conditions in San Mateo Etlatongo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather13°C (56°F)12 mm (0.5 inches)84%very high
February Weather15°C (59°F)6 mm (0.2 inches)80%extreme
March Weather16°C (62°F)18 mm (0.7 inches)73%extreme
April Weather18°C (64°F)62 mm (2.4 inches)67%extreme
May Weather18°C (65°F)97 mm (3.8 inches)72%extreme
June Weather17°C (63°F)293 mm (11.5 inches)73%extreme
July Weather16°C (62°F)134 mm (5.3 inches)76%extreme
August Weather16°C (62°F)225 mm (8.9 inches)80%extreme
September Weather16°C (62°F)275 mm (10.8 inches)84%extreme
October Weather16°C (61°F)127 mm (5.0 inches)89%extreme
November Weather14°C (58°F)25 mm (1.0 inches)88%extreme
December Weather13°C (57°F)6 mm (0.3 inches)88%very high

Compare San Mateo Etlatongo's Climate with Cities Worldwide