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September Weather in San Sebastian Rio Hondo, Mexico

Last updated: August 27, 2025

In September, the average temperature in San Sebastian Rio Hondo, Mexico hovers around 18°C (65°F). Expect a cool minimum of 11°C (52°F) and a warm maximum reaching 27°C (81°F). Be prepared for 635 mm (25.0 in) of precipitation over approximately 26 days, contributing to a notable average humidity of 84%.

September Temperature in San Sebastian Rio Hondo

In September in San Sebastian Rio Hondo, the average temperature is 18°C (65°F). Maximums can reach 27°C (81°F), while minimums can drop as low as 11°C (52°F). This pleasant climate makes it an ideal destination for travelers seeking a comfortable experience.

September Weather in San Sebastian Rio Hondo: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Sebastian Rio Hondo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Sebastian Rio Hondo, September typically has an average temperature of 18°C (65°F), with highs reaching up to 27°C (81°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec606264666665646464646261
Data source: Temperature data for San Sebastian Rio Hondo 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 Sebastian Rio Hondo

In San Sebastian Rio Hondo in September, the total precipitation amount is 635 mm (25.0 in) recorded over a span of 26 days.

September Precipitation Trends in San Sebastian Rio Hondo

The chart displays monthly precipitation patterns in San Sebastian Rio Hondo, 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 Sebastian Rio Hondo, September typically receives around 635 mm (25.0 inches) of precipitation spread over approximately 26 days.
JanFebMarAprMayJunJulAugSepOctNovDec15818973326744826896353261913
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Sebastian Rio Hondo

In San Sebastian Rio Hondo in September, humidity is 84%. With an average temperature of 18°C (65°F), this humidity feels like a thick blanket enveloping you, making travel feel heavy and slightly uncomfortable as the air clings to your skin and limits your breath.

September Average Humidity in San Sebastian Rio Hondo

This chart illustrates the average monthly humidity levels in San Sebastian Rio Hondo, 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 Sebastian Rio Hondo is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%80%73%67%72%73%76%80%84%89%88%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Sebastian Rio Hondo

In San Sebastian Rio Hondo in September, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in San Sebastian Rio Hondo.

Maximum UV Index Levels in San Sebastian Rio Hondo for September

The chart shows the monthly maximum UV Index (UVI) for San Sebastian Rio Hondo 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 Sebastian Rio Hondo typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec111315151515151415131110
Data source: San Sebastian Rio Hondo 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 Sebastian Rio Hondo Compares to Other Months

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

This table compares monthly weather conditions in San Sebastian Rio Hondo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (60°F)15 mm (0.6 inches)84%extreme
February Weather17°C (62°F)8 mm (0.3 inches)80%extreme
March Weather18°C (64°F)18 mm (0.7 inches)73%extreme
April Weather19°C (66°F)97 mm (3.8 inches)67%extreme
May Weather19°C (67°F)332 mm (13.1 inches)72%extreme
June Weather18°C (65°F)674 mm (26.5 inches)73%extreme
July Weather18°C (65°F)482 mm (19.0 inches)76%extreme
August Weather18°C (64°F)689 mm (27.1 inches)80%extreme
September Weather18°C (65°F)635 mm (25.0 inches)84%extreme
October Weather18°C (64°F)326 mm (12.8 inches)89%extreme
November Weather17°C (62°F)19 mm (0.7 inches)88%extreme
December Weather16°C (61°F)13 mm (0.5 inches)88%very high

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