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September Weather in Mexico, United States

Last updated: June 24, 2025

In September, the average temperature in Mexico, United States hovers around 22°C (72°F), providing a pleasant climate for visitors. Expect minimums of 6°C (43°F) and highs reaching up to 35°C (95°F). During this month, precipitation is moderate, with an average of 56 mm (2.2 in) over 6 days, while the air maintains an average humidity of 76%.

September Temperature in Mexico

In September in Mexico, the average temperature is 22°C (72°F). Maximums can reach 35°C (95°F), while minimums can dip as low as 6°C (43°F). This diverse range of temperatures makes Mexico a great destination for travelers seeking both warmth and cooler respite.

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

The chart illustrates September temperature patterns in Mexico, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mexico, September typically has an average temperature of 22°C (72°F), with highs reaching up to 35°C (95°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec303346546676797672574337
Data source: Temperature data for Mexico 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 Mexico

In Mexico in September, the precipitation amount is 56 mm (2.2 in) spread over 6 days.

September Precipitation Trends in Mexico

The chart displays monthly precipitation patterns in Mexico, 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 Mexico, September typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec666112211717711092125561095741
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Mexico

In Mexico in September humidity is 76%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, making travel slightly uncomfortable as you navigate through the thick, saturated air.

September Average Humidity in Mexico

This chart illustrates the average monthly humidity levels in Mexico, 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 Mexico is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Mexico

In Mexico in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Mexico.

Maximum UV Index Levels in Mexico for September

The chart shows the monthly maximum UV Index (UVI) for Mexico 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 Mexico typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109643
Data source: Mexico 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 Mexico Compares to Other Months

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

This table compares monthly weather conditions in Mexico, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)66 mm (2.6 inches)82%moderate
February Weather1°C (33°F)61 mm (2.4 inches)80%moderate
March Weather8°C (46°F)122 mm (4.8 inches)80%high
April Weather12°C (54°F)117 mm (4.6 inches)80%very high
May Weather19°C (66°F)177 mm (7.0 inches)82%very high
June Weather25°C (76°F)110 mm (4.3 inches)83%extreme
July Weather26°C (79°F)92 mm (3.6 inches)81%extreme
August Weather24°C (76°F)125 mm (4.9 inches)80%very high
September Weather22°C (72°F)56 mm (2.2 inches)76%very high
October Weather14°C (57°F)109 mm (4.3 inches)76%high
November Weather6°C (44°F)57 mm (2.2 inches)85%moderate
December Weather3°C (38°F)41 mm (1.6 inches)86%moderate

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