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September Weather in San Jose del Llano, Mexico

Last updated: August 27, 2025

In September, the average temperature in San Jose del Llano, Mexico hovers around 21°C (70°F). You might experience a refreshing minimum of 13°C (56°F), while the days can blaze with a maximum of 32°C (90°F). Be prepared for some rain, as 160 mm (6.3 in) of precipitation is expected over 23 days, contributing to the notable average humidity of 88%.

September Temperature in San Jose del Llano

In September in San Jose del Llano, the average temperature is 21°C (70°F). The maximum can reach 32°C (90°F), and the minimum can be as low as 13°C (56°F). This moderate climate makes it a great time for outdoor activities and exploring the local attractions.

September Weather in San Jose del Llano: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Jose del Llano, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Jose del Llano, September typically has an average temperature of 21°C (70°F), with highs reaching up to 32°C (90°F) and lows dropping to around 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec555762677275707270686356
Data source: Temperature data for San Jose del Llano 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 Jose del Llano

In San Jose del Llano in September, the total precipitation amount is 160 mm (6.3 in) distributed over 23 days.

September Precipitation Trends in San Jose del Llano

The chart displays monthly precipitation patterns in San Jose del Llano, 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 Jose del Llano, September typically receives around 160 mm (6.3 inches) of precipitation spread over approximately 23 days.
JanFebMarAprMayJunJulAugSepOctNovDec2550133799265192160485933
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Jose del Llano

In San Jose del Llano in September, humidity is 88%. With an average temperature of 21°C (70°F), this humidity feels like a thick blanket enveloping you, making every step feel heavier and slightly stifling, which can be quite challenging for travelers.

September Average Humidity in San Jose del Llano

This chart illustrates the average monthly humidity levels in San Jose del Llano, 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 Jose del Llano is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%69%57%49%49%64%82%87%88%83%84%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Jose del Llano

In San Jose del Llano 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 Jose del Llano.

Maximum UV Index Levels in San Jose del Llano for September

The chart shows the monthly maximum UV Index (UVI) for San Jose del Llano 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 Jose del Llano typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec710111413131313121186
Data source: San Jose del Llano 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 Jose del Llano Compares to Other Months

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

This table compares monthly weather conditions in San Jose del Llano, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather13°C (55°F)25 mm (1.0 inches)76%high
February Weather14°C (57°F)50 mm (2.0 inches)69%very high
March Weather17°C (62°F)13 mm (0.5 inches)57%extreme
April Weather19°C (67°F)3 mm (0.1 inches)49%extreme
May Weather22°C (72°F)7 mm (0.3 inches)49%extreme
June Weather24°C (75°F)99 mm (3.9 inches)64%extreme
July Weather21°C (71°F)265 mm (10.4 inches)82%extreme
August Weather22°C (72°F)192 mm (7.6 inches)87%extreme
September Weather21°C (70°F)160 mm (6.3 inches)88%extreme
October Weather20°C (69°F)48 mm (1.9 inches)83%extreme
November Weather17°C (63°F)59 mm (2.3 inches)84%very high
December Weather13°C (56°F)33 mm (1.3 inches)86%high

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