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September Weather in Alamo, Mexico

Last updated: August 27, 2025

In September, the average temperature in Alamo, Mexico is a warm 27°C (82°F), with a minimum of 18°C (64°F) and a maximum soaring to 37°C (100°F). Visitors can expect 189 mm (7.4 in) of precipitation spread over 20 days, contributing to a high average humidity of 84%.

September Temperature in Alamo

In September in Alamo, the average temperature is 27°C (82°F). Maximums can reach 37°C (100°F), and minimums can be as low as 18°C (64°F). Pack light clothing and stay hydrated, as the warm temperatures make it an ideal time for outdoor activities and exploration.

September Weather in Alamo: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Alamo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alamo, September typically has an average temperature of 27°C (82°F), with highs reaching up to 37°C (100°F) and lows dropping to around 18°C (64°F).
JanFebMarAprMayJunJulAugSepOctNovDec677074798383838381787268
Data source: Temperature data for Alamo 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 Alamo

In Alamo in September, the precipitation amount is 189 mm (7.4 in) over the course of 20 days.

September Precipitation Trends in Alamo

The chart displays monthly precipitation patterns in Alamo, 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 Alamo, September typically receives around 189 mm (7.4 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec492740631392001231521891966318
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Alamo

In Alamo in September humidity is 84%. With an average temperature of 27°C (82°F), this humidity feels like walking through a warm, damp blanket, making travel feel heavier and more exhausting.

September Average Humidity in Alamo

This chart illustrates the average monthly humidity levels in Alamo, 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 Alamo 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 Alamo

In Alamo 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 Alamo.

Maximum UV Index Levels in Alamo for September

The chart shows the monthly maximum UV Index (UVI) for Alamo 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 Alamo typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec710111212131312121087
Data source: Alamo 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 Alamo Compares to Other Months

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

This table compares monthly weather conditions in Alamo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather19°C (67°F)49 mm (1.9 inches)88%high
February Weather21°C (70°F)27 mm (1.1 inches)86%very high
March Weather23°C (74°F)40 mm (1.6 inches)83%extreme
April Weather26°C (79°F)63 mm (2.5 inches)80%extreme
May Weather28°C (83°F)138 mm (5.5 inches)82%extreme
June Weather28°C (83°F)200 mm (7.9 inches)79%extreme
July Weather28°C (83°F)123 mm (4.8 inches)72%extreme
August Weather29°C (84°F)152 mm (6.0 inches)74%extreme
September Weather27°C (82°F)189 mm (7.4 inches)84%extreme
October Weather25°C (78°F)196 mm (7.7 inches)92%very high
November Weather22°C (72°F)63 mm (2.5 inches)91%very high
December Weather20°C (69°F)18 mm (0.7 inches)91%high

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