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September Weather in Santa Lucia, Mexico

Last updated: August 27, 2025

In September, the average temperature in Santa Lucia, Mexico is a comfortable 19°C (66°F), with a minimum reaching 9°C (48°F) and a pleasant maximum of 29°C (85°F). Expect some rain, as precipitation totals around 117 mm (4.6 in) over approximately 14 days, complemented by a high average humidity of 81%.

September Temperature in Santa Lucia

In September in Santa Lucia, the average temperature is 19°C (66°F). Maximum can reach 29°C (85°F) and minimum can be as low as 9°C (48°F). This makes it an ideal time for traveling, offering pleasant weather for outdoor activities and sightseeing.

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 19°C (66°F), with highs reaching up to 29°C (85°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec555965687270686966645955
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 precipitation amount is 117 mm (4.6 in) spread over 14 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 117 mm (4.6 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec1386424808767117381312
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 81%. With an average temperature of 19°C (66°F), this humidity feels like a warm, heavy blanket enveloping you, making travel feel both muggy and slightly stifling, often leading to a need for frequent breaks in the shade.

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 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%69%65%64%75%78%67%64%82%86%87%87%
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 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 Santa Lucia, you can check here.

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 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec8111415151414141412108
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 Weather13°C (55°F)13 mm (0.5 inches)75%very high
February Weather15°C (59°F)8 mm (0.3 inches)69%extreme
March Weather18°C (65°F)6 mm (0.2 inches)65%extreme
April Weather20°C (69°F)4 mm (0.2 inches)64%extreme
May Weather22°C (72°F)24 mm (0.9 inches)75%extreme
June Weather21°C (70°F)80 mm (3.1 inches)78%extreme
July Weather20°C (69°F)87 mm (3.4 inches)67%extreme
August Weather20°C (69°F)67 mm (2.6 inches)64%extreme
September Weather19°C (66°F)117 mm (4.6 inches)81%extreme
October Weather18°C (64°F)38 mm (1.5 inches)85%extreme
November Weather15°C (60°F)12 mm (0.5 inches)87%very high
December Weather13°C (55°F)12 mm (0.5 inches)87%very high

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