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September Weather in El Salvador, Mexico

Last updated: August 27, 2025

In El Salvador, Mexico, the weather in September features an average temperature of 19°C (67°F), with a minimum of 10°C (50°F) and a maximum of 30°C (87°F). Expect precipitation of approximately 59 mm (2.3 in) over about 9 days, accompanied by a comfortable average humidity level of 72%.

September Temperature in El Salvador

In September in El Salvador, the average temperature is 19°C (67°F). The maximum can reach 30°C (87°F), and the minimum can be as low as 10°C (50°F). This pleasant climate makes El Salvador an ideal destination for outdoor activities and sightseeing during this time of year.

September Weather in El Salvador: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in El Salvador, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In El Salvador, September typically has an average temperature of 19°C (67°F), with highs reaching up to 30°C (87°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec535863677070696967655954
Data source: Temperature data for El Salvador 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 El Salvador

In El Salvador in September, the precipitation amount is 59 mm (2.3 in) over the course of 9 days.

September Precipitation Trends in El Salvador

The chart displays monthly precipitation patterns in El Salvador, 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 El Salvador, September typically receives around 59 mm (2.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec151223325240682059221127
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in El Salvador

In El Salvador in September, humidity is 72%. With an average temperature of 19°C (67°F), this humidity feels like a warm, damp blanket enveloping you, making outdoor activities a bit more challenging but also giving the air a refreshing quality that's invigorating for short excursions.

September Average Humidity in El Salvador

This chart illustrates the average monthly humidity levels in El Salvador, 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 El Salvador 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 El Salvador

In El Salvador 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 El Salvador.

Maximum UV Index Levels in El Salvador for September

The chart shows the monthly maximum UV Index (UVI) for El Salvador 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 El Salvador typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec810131414141414131297
Data source: El Salvador 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 El Salvador Compares to Other Months

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

This table compares monthly weather conditions in El Salvador, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (53°F)15 mm (0.6 inches)75%very high
February Weather14°C (58°F)12 mm (0.5 inches)70%very high
March Weather17°C (63°F)23 mm (0.9 inches)65%extreme
April Weather19°C (67°F)32 mm (1.3 inches)59%extreme
May Weather21°C (70°F)52 mm (2.0 inches)66%extreme
June Weather21°C (71°F)40 mm (1.6 inches)71%extreme
July Weather21°C (69°F)68 mm (2.7 inches)57%extreme
August Weather21°C (69°F)19 mm (0.8 inches)58%extreme
September Weather19°C (67°F)59 mm (2.3 inches)72%extreme
October Weather18°C (65°F)22 mm (0.9 inches)76%extreme
November Weather15°C (59°F)11 mm (0.4 inches)81%very high
December Weather12°C (54°F)27 mm (1.1 inches)80%high

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