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September Weather in Atotonilco el Grande, Mexico

Last updated: August 27, 2025

In September, the average temperature in Atotonilco el Grande, Mexico hovers around 17°C (63°F), with daily values ranging from a chilly 5°C (42°F) to a pleasant 26°C (79°F). Be prepared for moderate rainfall, as the area receives about 145 mm (5.7 in) of precipitation over 21 days, contributing to a notably high humidity level of 84%.

September Temperature in Atotonilco el Grande

In September in Atotonilco el Grande, the average temperature is 17°C (63°F), with maximums reaching 26°C (79°F) and minimums dropping to as low as 5°C (42°F). This mild climate makes Atotonilco el Grande a perfect destination for travelers looking to enjoy comfortable outdoor activities.

September Weather in Atotonilco el Grande: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Atotonilco el Grande, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Atotonilco el Grande, September typically has an average temperature of 17°C (63°F), with highs reaching up to 26°C (79°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec545861656664636363605655
Data source: Temperature data for Atotonilco el 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 Atotonilco el Grande

In Atotonilco el Grande in September, the total precipitation amount is 145 mm (5.7 in) spread over 21 days.

September Precipitation Trends in Atotonilco el Grande

The chart displays monthly precipitation patterns in Atotonilco el 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 Atotonilco el Grande, September typically receives around 145 mm (5.7 inches) of precipitation spread over approximately 21 days.
JanFebMarAprMayJunJulAugSepOctNovDec121122355313511412314597255
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Atotonilco el Grande

In Atotonilco el Grande in September, humidity is 84%. With an average temperature of 17°C (63°F), this humidity feels like a warm, sticky embrace that can make traveling feel heavy and cumbersome, often leaving visitors yearning for refreshing breezes and shade.

September Average Humidity in Atotonilco el Grande

This chart illustrates the average monthly humidity levels in Atotonilco el 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 Atotonilco el Grande is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%86%83%80%82%79%72%74%84%92%91%91%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Atotonilco el Grande

In Atotonilco el Grande 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 Atotonilco el Grande, you can check here.

Maximum UV Index Levels in Atotonilco el Grande for September

The chart shows the monthly maximum UV Index (UVI) for Atotonilco el 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 Atotonilco el Grande typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec9111414151414141412108
Data source: Atotonilco el 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 Atotonilco el Grande Compares to Other Months

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

This table compares monthly weather conditions in Atotonilco el Grande, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)12 mm (0.5 inches)88%very high
February Weather14°C (58°F)11 mm (0.4 inches)86%extreme
March Weather16°C (61°F)22 mm (0.9 inches)83%extreme
April Weather18°C (65°F)35 mm (1.4 inches)80%extreme
May Weather19°C (67°F)53 mm (2.1 inches)82%extreme
June Weather18°C (65°F)135 mm (5.3 inches)79%extreme
July Weather17°C (63°F)114 mm (4.5 inches)72%extreme
August Weather17°C (63°F)123 mm (4.8 inches)74%extreme
September Weather17°C (63°F)145 mm (5.7 inches)84%extreme
October Weather16°C (61°F)97 mm (3.8 inches)92%extreme
November Weather14°C (57°F)25 mm (1.0 inches)91%very high
December Weather13°C (55°F)5 mm (0.2 inches)91%very high

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