September Weather in El Salvador, Mexico

Last updated: August 27, 2025

In September, the average temperature in El Salvador, Mexico hovers around 22°C (72°F). Expect a minimum of 16°C (62°F) and a maximum of 32°C (90°F). With precipitation totaling 187 mm (7.3 in) over approximately 23 days, it’s advisable to be prepared for the wet weather. Don't forget, the average humidity sits at a high 84%, adding to the tropical allure of this destination!

September Temperature in El Salvador

In September in El Salvador, the average temperature is 22°C (72°F), with maximums reaching up to 32°C (90°F) and minimums dropping as low as 16°C (62°F). This pleasant climate makes it an ideal time to explore the outdoors and enjoy various activities in El Salvador.

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 22°C (72°F), with highs reaching up to 32°C (90°F) and lows dropping to around 16°C (62°F).

Data source: Temperature data for El Salvador generated using information from the Copernicus Climate Change Service.

September Precipitation in El Salvador

In El Salvador in September, the precipitation amount is 187 mm (7.3 in) over the course of 23 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 187 mm (7.3 inches) of precipitation spread over approximately 23 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in El Salvador

In El Salvador in September humidity is 84%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, making travel feel slightly stifling but also lending a vibrant energy to the atmosphere, which can be both invigorating and tiring as you explore.

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 84%, offering insight into how humid the weather typically is during this month.

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.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	17°C (64°F)	10 mm (0.4 inches)	64%	very high
February Weather	19°C (66°F)	15 mm (0.6 inches)	57%	extreme
March Weather	21°C (71°F)	2 mm (0.1 inches)	46%	extreme
April Weather	23°C (73°F)	1 mm (0.0 inches)	42%	extreme
May Weather	24°C (76°F)	12 mm (0.5 inches)	51%	extreme
June Weather	25°C (76°F)	76 mm (3.0 inches)	74%	extreme
July Weather	22°C (73°F)	201 mm (7.9 inches)	79%	extreme
August Weather	23°C (73°F)	177 mm (7.0 inches)	81%	extreme
September Weather	22°C (72°F)	187 mm (7.3 inches)	84%	extreme
October Weather	22°C (71°F)	63 mm (2.5 inches)	75%	extreme
November Weather	20°C (68°F)	15 mm (0.6 inches)	71%	very high
December Weather	18°C (64°F)	13 mm (0.5 inches)	74%	very high