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September Weather in Arroyo Seco, Mexico

Last updated: August 27, 2025

In Arroyo Seco, Mexico, the average temperature in September hovers around 22°C (73°F). Expect comfortable days, but be prepared for variability, as temperatures can dip to a cool 12°C (54°F) or rise to a scorching 35°C (96°F). With an average precipitation of 178 mm (7.0 in) spread over 22 days, it's wise to bring an umbrella. You’ll also experience high humidity levels of around 84%, making it essential to stay hydrated and cool!

September Temperature in Arroyo Seco

In September in Arroyo Seco, the average temperature is 22°C (73°F). Maximum temperatures can reach 35°C (96°F), while minimum temperatures can drop to as low as 12°C (54°F). This makes Arroyo Seco an ideal destination for travelers seeking warm weather with comfortable nights.

September Weather in Arroyo Seco: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Arroyo Seco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arroyo Seco, September typically has an average temperature of 22°C (73°F), with highs reaching up to 35°C (96°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec596368737675747472696360
Data source: Temperature data for Arroyo Seco 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 Arroyo Seco

In Arroyo Seco in September, the total precipitation amount is 178 mm (7.0 in), occurring over 22 days.

September Precipitation Trends in Arroyo Seco

The chart displays monthly precipitation patterns in Arroyo Seco, 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 Arroyo Seco, September typically receives around 178 mm (7.0 inches) of precipitation spread over approximately 22 days.
JanFebMarAprMayJunJulAugSepOctNovDec20212524561321221031781544115
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Arroyo Seco

In Arroyo Seco in September, humidity is 84%. With an average temperature of 22°C (73°F), this humidity feels like a warm, enveloping blanket, making outdoor activities quite uncomfortable and necessitating frequent breaks to stay hydrated while exploring.

September Average Humidity in Arroyo Seco

This chart illustrates the average monthly humidity levels in Arroyo Seco, 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 Arroyo Seco is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%86%83%80%82%79%72%74%84%92%91%91%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Arroyo Seco

In Arroyo Seco in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Arroyo Seco.

Maximum UV Index Levels in Arroyo Seco for September

The chart shows the monthly maximum UV Index (UVI) for Arroyo Seco 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 Arroyo Seco typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec810131413131413131197
Data source: Arroyo Seco 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 Arroyo Seco Compares to Other Months

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

This table compares monthly weather conditions in Arroyo Seco, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather15°C (59°F)20 mm (0.8 inches)88%very high
February Weather17°C (63°F)21 mm (0.8 inches)86%very high
March Weather20°C (68°F)25 mm (1.0 inches)83%extreme
April Weather23°C (73°F)24 mm (0.9 inches)80%extreme
May Weather25°C (76°F)56 mm (2.2 inches)82%extreme
June Weather24°C (75°F)132 mm (5.2 inches)79%extreme
July Weather23°C (74°F)122 mm (4.8 inches)72%extreme
August Weather24°C (75°F)103 mm (4.1 inches)74%extreme
September Weather22°C (73°F)178 mm (7.0 inches)84%extreme
October Weather20°C (69°F)154 mm (6.1 inches)92%extreme
November Weather17°C (64°F)41 mm (1.6 inches)91%very high
December Weather15°C (60°F)15 mm (0.6 inches)91%high

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