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September Weather in Santa Lucia, Mexico

Last updated: August 27, 2025

The average temperature in Santa Lucia, Mexico during September is a warm 26°C (80°F), making it an inviting destination. Temperatures can swing from a minimum of 17°C (64°F) to a sizzling maximum of 39°C (102°F). Expect some rain, with precipitation averaging 222 mm (8.7 in) over 20 days. With an average humidity of 84%, be prepared for a tropical feel throughout the month!

September Temperature in Santa Lucia

In September in Santa Lucia, the average temperature is 26°C (80°F), with maximums reaching up to 39°C (102°F) and minimums dropping as low as 17°C (64°F). It's an ideal time to travel for those who enjoy warm weather and sunshine.

September Weather in Santa Lucia: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Santa Lucia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santa Lucia, September typically has an average temperature of 26°C (80°F), with highs reaching up to 39°C (102°F) and lows dropping to around 17°C (64°F).
JanFebMarAprMayJunJulAugSepOctNovDec646772778181808179757065
Data source: Temperature data for Santa Lucia 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 Santa Lucia

In Santa Lucia in September, the total precipitation amount is 222 mm (8.7 in) over the course of 20 days.

September Precipitation Trends in Santa Lucia

The chart displays monthly precipitation patterns in Santa Lucia, 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 Santa Lucia, September typically receives around 222 mm (8.7 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec7560821011281821281422222788248
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Santa Lucia

In Santa Lucia in September, humidity is 84%. With an average temperature of 26°C (80°F), this humidity feels like a warm blanket enveloping you, making travel feel sticky and intense, often leaving you longing for a cool breeze or a shaded spot to escape the heat.

September Average Humidity in Santa Lucia

This chart illustrates the average monthly humidity levels in Santa Lucia, 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 Santa Lucia 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 Santa Lucia

In Santa Lucia in September, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Santa Lucia.

Maximum UV Index Levels in Santa Lucia for September

The chart shows the monthly maximum UV Index (UVI) for Santa Lucia 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 Santa Lucia typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec710121312131313121197
Data source: Santa Lucia 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 Santa Lucia Compares to Other Months

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

This table compares monthly weather conditions in Santa Lucia, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather18°C (64°F)75 mm (3.0 inches)88%high
February Weather20°C (68°F)60 mm (2.3 inches)86%very high
March Weather22°C (72°F)82 mm (3.2 inches)83%extreme
April Weather25°C (77°F)101 mm (4.0 inches)80%extreme
May Weather27°C (81°F)128 mm (5.0 inches)82%extreme
June Weather27°C (81°F)182 mm (7.2 inches)79%extreme
July Weather27°C (81°F)128 mm (5.0 inches)72%extreme
August Weather27°C (81°F)142 mm (5.6 inches)74%extreme
September Weather26°C (80°F)222 mm (8.7 inches)84%extreme
October Weather24°C (76°F)278 mm (10.9 inches)92%extreme
November Weather21°C (70°F)82 mm (3.2 inches)91%very high
December Weather19°C (66°F)48 mm (1.9 inches)91%high

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