nomadseason

September Weather in San Ignacio, Mexico

Last updated: August 27, 2025

In September, the average temperature in San Ignacio, Mexico hovers around 26°C (79°F). Expect a comfortable minimum of 19°C (67°F) and occasional highs reaching up to 34°C (93°F). During this time, 23 days may bring about 176 mm (6.9 in) of precipitation, resulting in an average humidity level of 83%.

September Temperature in San Ignacio

In September in San Ignacio, the average temperature is 26°C (79°F). Maximums can reach 34°C (93°F) and minimums can be as low as 19°C (67°F). This pleasant warm climate makes San Ignacio an ideal destination for outdoor activities and exploration during this time.

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 26°C (79°F), with highs reaching up to 34°C (93°F) and lows dropping to around 19°C (67°F).
JanFebMarAprMayJunJulAugSepOctNovDec666872757981818079787367
Data source: Temperature data for San Ignacio generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
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 176 mm (6.9 in), spread over 23 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 176 mm (6.9 inches) of precipitation spread over approximately 23 days.
JanFebMarAprMayJunJulAugSepOctNovDec102910141151241176772017
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in San Ignacio

In San Ignacio in September, humidity is 83%. With an average temperature of 26°C (79°F), this humidity feels like a heavy blanket enveloping you, making travel an exercise in endurance as the air clings to your skin and saps your energy.

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 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%66%61%56%61%73%82%83%83%79%77%78%
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.
JanFebMarAprMayJunJulAugSepOctNovDec710111313121212121186
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 Weather19°C (66°F)10 mm (0.4 inches)74%high
February Weather20°C (68°F)29 mm (1.1 inches)66%very high
March Weather22°C (72°F)1 mm (0.0 inches)61%extreme
April Weather24°C (75°F)0 mm (0.0 inches)56%extreme
May Weather26°C (79°F)1 mm (0.0 inches)61%extreme
June Weather27°C (82°F)41 mm (1.6 inches)73%extreme
July Weather27°C (81°F)151 mm (6.0 inches)82%extreme
August Weather27°C (80°F)241 mm (9.5 inches)83%extreme
September Weather26°C (79°F)176 mm (6.9 inches)83%extreme
October Weather25°C (78°F)77 mm (3.0 inches)78%extreme
November Weather23°C (73°F)20 mm (0.8 inches)77%very high
December Weather20°C (68°F)17 mm (0.7 inches)78%high

Compare San Ignacio's Climate with Cities Worldwide