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September Weather in Lomas de San Juan, Mexico

Last updated: August 27, 2025

In September, the average temperature in Lomas de San Juan, Mexico hovers around 25°C (78°F). Expect a minimum of 20°C (68°F) and a maximum that can reach 33°C (92°F). Be prepared for considerable precipitation, with about 393 mm (15.5 in) falling over 26 days. The air feels quite humid, with an average humidity level of 82%.

September Temperature in Lomas de San Juan

In September in Lomas de San Juan, the average temperature is 25°C (78°F). Maximum temperatures can reach up to 33°C (92°F), while minimums can drop to as low as 20°C (68°F). This pleasant climate makes it an ideal destination for travelers seeking warm weather and outdoor activities.

September Weather in Lomas de San Juan: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Lomas de San Juan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lomas de San Juan, September typically has an average temperature of 25°C (78°F), with highs reaching up to 33°C (92°F) and lows dropping to around 20°C (68°F).
JanFebMarAprMayJunJulAugSepOctNovDec767779818179797878787776
Data source: Temperature data for Lomas de San Juan 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 Lomas de San Juan

In Lomas de San Juan in September, the total precipitation amount is 393 mm (15.5 in) spread over 26 days.

September Precipitation Trends in Lomas de San Juan

The chart displays monthly precipitation patterns in Lomas de San Juan, 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 Lomas de San Juan, September typically receives around 393 mm (15.5 inches) of precipitation spread over approximately 26 days.
JanFebMarAprMayJunJulAugSepOctNovDec6321372791893693932906120
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lomas de San Juan

In Lomas de San Juan in September, humidity is 82%. With an average temperature of 25°C (78°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities a bit more challenging and encouraging you to seek shade or a cool spot during your travels.

September Average Humidity in Lomas de San Juan

This chart illustrates the average monthly humidity levels in Lomas de San Juan, 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 Lomas de San Juan 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 Lomas de San Juan

In Lomas de San Juan 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 Lomas de San Juan, you can check here.

Maximum UV Index Levels in Lomas de San Juan for September

The chart shows the monthly maximum UV Index (UVI) for Lomas de San Juan 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 Lomas de San Juan typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1011141314141413141298
Data source: Lomas de San Juan 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 Lomas de San Juan Compares to Other Months

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

This table compares monthly weather conditions in Lomas de San Juan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (77°F)6 mm (0.2 inches)65%very high
February Weather25°C (77°F)3 mm (0.1 inches)61%extreme
March Weather26°C (80°F)2 mm (0.1 inches)59%extreme
April Weather27°C (81°F)1 mm (0.0 inches)62%extreme
May Weather27°C (82°F)37 mm (1.4 inches)73%extreme
June Weather26°C (79°F)279 mm (11.0 inches)78%extreme
July Weather26°C (79°F)189 mm (7.4 inches)79%extreme
August Weather26°C (79°F)369 mm (14.5 inches)82%extreme
September Weather25°C (78°F)393 mm (15.5 inches)82%extreme
October Weather25°C (78°F)290 mm (11.4 inches)79%extreme
November Weather25°C (77°F)60 mm (2.4 inches)72%very high
December Weather24°C (76°F)20 mm (0.8 inches)70%very high

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