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September Weather in La Ascension, Mexico

Last updated: August 27, 2025

In La Ascension, Mexico, the average temperature in September hovers around 18°C (64°F), with a minimum of 8°C (47°F) and a maximum of 27°C (81°F). Expect a fair share of moisture, as 145 mm (5.7 in) of precipitation is likely over 21 days. Humidity is also on the higher side, averaging 72%, making for a characteristically damp climate.

September Temperature in La Ascension

In September in La Ascension, the average temperature is 18°C (64°F). The maximum can reach 27°C (81°F), while the minimum can be as low as 8°C (47°F). This makes it an ideal time for travelers to enjoy mild weather and explore the area comfortably.

September Weather in La Ascension: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in La Ascension, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In La Ascension, September typically has an average temperature of 18°C (64°F), with highs reaching up to 27°C (81°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec515660646767666664615652
Data source: Temperature data for La Ascension 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 La Ascension

In La Ascension in September, the total precipitation amount is 145 mm (5.7 in) spread over 21 days.

September Precipitation Trends in La Ascension

The chart displays monthly precipitation patterns in La Ascension, 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 La Ascension, September typically receives around 145 mm (5.7 inches) of precipitation spread over approximately 21 days.
JanFebMarAprMayJunJulAugSepOctNovDec1192232619212876145391215
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in La Ascension

In La Ascension in September, humidity is 72%. With an average temperature of 18°C (64°F), this humidity feels like a warm, sticky embrace, making travel somewhat uncomfortable as the air clings to your skin, leaving you longing for a refreshing breeze.

September Average Humidity in La Ascension

This chart illustrates the average monthly humidity levels in La Ascension, 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 La Ascension is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%70%65%59%66%71%57%58%73%76%81%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in La Ascension

In La Ascension 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 La Ascension.

Maximum UV Index Levels in La Ascension for September

The chart shows the monthly maximum UV Index (UVI) for La Ascension 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 La Ascension typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec810121414131414131297
Data source: La Ascension 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 La Ascension Compares to Other Months

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

This table compares monthly weather conditions in La Ascension, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (51°F)11 mm (0.4 inches)75%very high
February Weather13°C (56°F)9 mm (0.3 inches)70%very high
March Weather16°C (60°F)22 mm (0.9 inches)65%extreme
April Weather18°C (64°F)32 mm (1.3 inches)59%extreme
May Weather20°C (68°F)60 mm (2.4 inches)66%extreme
June Weather19°C (67°F)92 mm (3.6 inches)71%extreme
July Weather19°C (66°F)128 mm (5.0 inches)57%extreme
August Weather19°C (66°F)76 mm (3.0 inches)58%extreme
September Weather18°C (64°F)145 mm (5.7 inches)72%extreme
October Weather16°C (61°F)39 mm (1.5 inches)76%extreme
November Weather13°C (56°F)12 mm (0.5 inches)81%very high
December Weather11°C (52°F)15 mm (0.6 inches)80%high

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