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September Weather in San Juan de los Planes, Mexico

Last updated: August 27, 2025

In San Juan de los Planes, Mexico, the average temperature in September is a warm 28°C (82°F), making it a lovely time to explore. Expect daytime highs of up to 35°C (95°F), while nights cool down to a pleasant 22°C (71°F). Keep in mind that this month brings about 123 mm (4.9 in) of precipitation over 11 days, and the average humidity sits at a balmy 74%. Perfect weather for enjoying the local sights!

September Temperature in San Juan de los Planes

In September in San Juan de los Planes, the average temperature is 28°C (82°F). Maximums can reach 35°C (95°F), while minimums can be as low as 22°C (71°F). This makes it an ideal time for travelers seeking warm weather and outdoor activities.

September Weather in San Juan de los Planes: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Juan de los Planes, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Juan de los Planes, September typically has an average temperature of 28°C (82°F), with highs reaching up to 35°C (95°F) and lows dropping to around 22°C (71°F).
JanFebMarAprMayJunJulAugSepOctNovDec646568737782858582807467
Data source: Temperature data for San Juan de los Planes 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 Juan de los Planes

In San Juan de los Planes in September, the precipitation amount reaches 123 mm (4.9 in) over the course of 11 days.

September Precipitation Trends in San Juan de los Planes

The chart displays monthly precipitation patterns in San Juan de los Planes, 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 Juan de los Planes, September typically receives around 123 mm (4.9 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec816200112665123112118
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Juan de los Planes

In San Juan de los Planes in September, humidity is 74%. With an average temperature of 28°C (82°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor activities feel more exhausting and requiring frequent breaks to stay hydrated.

September Average Humidity in San Juan de los Planes

This chart illustrates the average monthly humidity levels in San Juan de los Planes, 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 Juan de los Planes is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec69%66%64%64%66%67%72%73%74%75%73%72%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Juan de los Planes

In San Juan de los Planes 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 Juan de los Planes.

Maximum UV Index Levels in San Juan de los Planes for September

The chart shows the monthly maximum UV Index (UVI) for San Juan de los Planes 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 Juan de los Planes typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec79111313131212121086
Data source: San Juan de los Planes 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 Juan de los Planes Compares to Other Months

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

This table compares monthly weather conditions in San Juan de los Planes, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather18°C (64°F)8 mm (0.3 inches)69%high
February Weather18°C (65°F)16 mm (0.6 inches)66%very high
March Weather20°C (68°F)2 mm (0.1 inches)64%extreme
April Weather23°C (73°F)0 mm (0.0 inches)64%extreme
May Weather25°C (77°F)0 mm (0.0 inches)66%extreme
June Weather28°C (82°F)11 mm (0.4 inches)67%extreme
July Weather29°C (85°F)26 mm (1.0 inches)72%extreme
August Weather29°C (85°F)65 mm (2.5 inches)73%extreme
September Weather28°C (82°F)123 mm (4.9 inches)74%extreme
October Weather27°C (80°F)11 mm (0.4 inches)75%very high
November Weather23°C (74°F)21 mm (0.8 inches)73%very high
December Weather19°C (67°F)18 mm (0.7 inches)72%high

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