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September Weather in San Ignacio, Mexico

Last updated: August 27, 2025

In San Ignacio, Mexico, the average temperature in September hovers around 28°C (83°F), making it a warm month for outdoor activities. You can expect temperatures to range from a comfortable 26°C (78°F) to a high of 31°C (88°F). However, be prepared for some rain, as 256 mm (10.1 in) of precipitation is likely across 24 days. With an average humidity of 78%, it’s advisable to stay hydrated and enjoy the lush surroundings!

September Temperature in San Ignacio

In September in San Ignacio, the average temperature is 28°C (83°F), with maximums reaching up to 31°C (88°F) and minimums dipping as low as 26°C (78°F). This pleasant weather makes it an ideal time for travel and outdoor activities.

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 28°C (83°F), with highs reaching up to 31°C (88°F) and lows dropping to around 26°C (78°F).
JanFebMarAprMayJunJulAugSepOctNovDec747373747780838382828076
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 total precipitation amount is 256 mm (10.1 in) spread over 24 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 256 mm (10.1 inches) of precipitation spread over approximately 24 days.
JanFebMarAprMayJunJulAugSepOctNovDec262712686971972561762419
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 78%. With an average temperature of 28°C (83°F), this humidity feels like a heavy blanket enveloping you, making outdoor activities perspire more quickly and requiring frequent breaks in the shade for comfort.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec71%69%67%66%69%78%79%78%78%75%74%74%
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.
JanFebMarAprMayJunJulAugSepOctNovDec810121312131213121197
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 Weather23°C (74°F)26 mm (1.0 inches)71%very high
February Weather23°C (73°F)27 mm (1.1 inches)69%very high
March Weather23°C (74°F)1 mm (0.1 inches)67%extreme
April Weather24°C (75°F)2 mm (0.1 inches)66%extreme
May Weather25°C (77°F)6 mm (0.2 inches)69%extreme
June Weather27°C (80°F)86 mm (3.4 inches)78%extreme
July Weather28°C (83°F)96 mm (3.8 inches)79%extreme
August Weather28°C (83°F)197 mm (7.7 inches)78%extreme
September Weather28°C (83°F)256 mm (10.1 inches)78%extreme
October Weather28°C (83°F)176 mm (6.9 inches)75%extreme
November Weather27°C (81°F)24 mm (0.9 inches)74%very high
December Weather25°C (77°F)19 mm (0.8 inches)74%high

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