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September Weather in San Ignacio, Mexico

Last updated: August 27, 2025

In San Ignacio, Mexico, the average temperature in September reaches a pleasant 25°C (78°F), with a minimum dipping to 13°C (56°F) and maximum peaking at a sizzling 39°C (102°F). Expect some rain, as 73 mm (2.9 in) of precipitation typically falls over 8 days. Additionally, the atmosphere can feel quite humid, with an average humidity of 86%, perfect for those who enjoy a tropical vibe!

September Temperature in San Ignacio

In September in San Ignacio, the average temperature is 25°C (78°F). Maximums can reach 39°C (102°F) and minimums can be as low as 13°C (56°F). This variation makes it a perfect time for travelers to enjoy both warm days and cooler evenings.

September Weather in San Ignacio: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Ignacio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Ignacio, September typically has an average temperature of 25°C (78°F), with highs reaching up to 39°C (102°F) and lows dropping to around 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec556169768287828377736455
Data source: Temperature data for San Ignacio 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 San Ignacio

In San Ignacio in September, the precipitation amount is 73 mm (2.9 in) over a span of 8 days.

September Precipitation Trends in San Ignacio

The chart displays monthly precipitation patterns in San Ignacio, 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 San Ignacio, September typically receives around 73 mm (2.9 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec5432414505073161114
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Ignacio

In San Ignacio in September, humidity is 86%. With an average temperature of 25°C (78°F), this humidity feels like a warm, damp blanket wrapping around you, making outdoor activities challenging and potentially uncomfortable for traveling.

September Average Humidity in San Ignacio

This chart illustrates the average monthly humidity levels in San Ignacio, 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 San Ignacio is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%65%58%48%48%54%72%77%86%82%85%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Ignacio

In San Ignacio 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 San Ignacio.

Maximum UV Index Levels in San Ignacio for September

The chart shows the monthly maximum UV Index (UVI) for San Ignacio 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 San Ignacio typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec69111314131313121086
Data source: San Ignacio 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 San Ignacio Compares to Other Months

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

This table compares monthly weather conditions in San Ignacio, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather13°C (55°F)5 mm (0.2 inches)75%high
February Weather16°C (61°F)4 mm (0.2 inches)65%very high
March Weather20°C (69°F)3 mm (0.1 inches)58%extreme
April Weather24°C (76°F)2 mm (0.1 inches)48%extreme
May Weather28°C (83°F)4 mm (0.2 inches)48%extreme
June Weather30°C (87°F)14 mm (0.5 inches)54%extreme
July Weather28°C (83°F)50 mm (2.0 inches)72%extreme
August Weather28°C (83°F)50 mm (1.9 inches)77%extreme
September Weather25°C (78°F)73 mm (2.9 inches)86%extreme
October Weather23°C (73°F)15 mm (0.6 inches)82%very high
November Weather18°C (64°F)11 mm (0.4 inches)85%very high
December Weather13°C (55°F)14 mm (0.6 inches)87%high

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