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September Weather in Apopa, El Salvador

Last updated: August 23, 2025

In Apopa, El Salvador, the average temperature in September is a warm 26°C (79°F), with a minimum dipping to 20°C (69°F) and a peak reaching as high as 34°C (93°F). Expect 301 mm (11.9 in) of precipitation spread over 29 days, contributing to a rather humid environment with an average humidity of 77%.

September Temperature in Apopa

In September in Apopa, the average temperature is 26°C (79°F). The maximum can reach 34°C (93°F), and the minimum can be as low as 20°C (69°F). This climate makes Apopa an ideal destination for travelers seeking warm and pleasant weather.

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

The chart illustrates September temperature patterns in Apopa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Apopa, September typically has an average temperature of 26°C (79°F), with highs reaching up to 34°C (93°F) and lows dropping to around 20°C (69°F).
JanFebMarAprMayJunJulAugSepOctNovDec777981818078808078787877
Data source: Temperature data for Apopa 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 Apopa

In Apopa in September, the total precipitation amount is 301 mm (11.9 in), occurring over the course of 29 days.

September Precipitation Trends in Apopa

The chart displays monthly precipitation patterns in Apopa, 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 Apopa, September typically receives around 301 mm (11.9 inches) of precipitation spread over approximately 29 days.
JanFebMarAprMayJunJulAugSepOctNovDec34559269292157252301272587
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Apopa

In Apopa in September humidity is 77%. With an average temperature of 26°C (79°F), this humidity feels like walking through a warm, thick fog that clings to your skin, making every step feel heavier and more exhausting while exploring the sights.

September Average Humidity in Apopa

This chart illustrates the average monthly humidity levels in Apopa, 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 Apopa is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec63%62%59%59%59%68%78%79%77%77%75%67%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Apopa

In Apopa 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 Apopa.

Maximum UV Index Levels in Apopa for September

The chart shows the monthly maximum UV Index (UVI) for Apopa 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 Apopa typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec11121414141413131313109
Data source: Apopa 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 Apopa Compares to Other Months

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

This table compares monthly weather conditions in Apopa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)3 mm (0.1 inches)63%extreme
February Weather26°C (79°F)4 mm (0.2 inches)62%extreme
March Weather27°C (81°F)5 mm (0.2 inches)59%extreme
April Weather27°C (81°F)59 mm (2.3 inches)59%extreme
May Weather27°C (80°F)269 mm (10.6 inches)59%extreme
June Weather26°C (79°F)292 mm (11.5 inches)68%extreme
July Weather27°C (80°F)157 mm (6.2 inches)77%extreme
August Weather26°C (80°F)252 mm (9.9 inches)79%extreme
September Weather26°C (79°F)301 mm (11.9 inches)77%extreme
October Weather25°C (78°F)272 mm (10.7 inches)77%extreme
November Weather25°C (78°F)58 mm (2.3 inches)75%very high
December Weather25°C (78°F)7 mm (0.3 inches)66%very high

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