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September Weather in Usulutan, El Salvador

Last updated: August 23, 2025

In September, the average temperature in Usulutan, El Salvador hovers around 27°C (81°F), with a minimum of 24°C (75°F) and a maximum reaching 33°C (91°F). Expect about 280 mm (11.0 in) of precipitation spread over 27 days, resulting in an average humidity level of 77%. Prepare for a warm and wet month!

September Temperature in Usulutan

In September in Usulutan, the average temperature is 27°C (81°F), with maximums reaching 33°C (91°F) and minimums dropping as low as 24°C (75°F). This pleasant weather makes it an ideal time for traveling and exploring the local attractions.

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

The chart illustrates September temperature patterns in Usulutan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Usulutan, September typically has an average temperature of 27°C (81°F), with highs reaching up to 33°C (91°F) and lows dropping to around 24°C (75°F).
JanFebMarAprMayJunJulAugSepOctNovDec818284848382838281818181
Data source: Temperature data for Usulutan 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 Usulutan

In Usulutan, in September, the precipitation amount is 280 mm (11.0 in) spread across 27 days.

September Precipitation Trends in Usulutan

The chart displays monthly precipitation patterns in Usulutan, 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 Usulutan, September typically receives around 280 mm (11.0 inches) of precipitation spread over approximately 27 days.
JanFebMarAprMayJunJulAugSepOctNovDec13725230353141275280409814
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Usulutan

In Usulutan in September, humidity is 77%. With an average temperature of 27°C (81°F), this humidity feels like a warm blanket, making travel feel sticky and heavy, as sweat clings to the skin and the air becomes thick, causing you to long for refreshing breezes and cool shade.

September Average Humidity in Usulutan

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

In Usulutan 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 Usulutan.

Maximum UV Index Levels in Usulutan for September

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

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

This table compares monthly weather conditions in Usulutan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (82°F)1 mm (0.1 inches)63%extreme
February Weather28°C (83°F)3 mm (0.1 inches)62%extreme
March Weather29°C (84°F)7 mm (0.3 inches)59%extreme
April Weather29°C (84°F)25 mm (1.0 inches)59%extreme
May Weather28°C (83°F)230 mm (9.1 inches)59%extreme
June Weather28°C (82°F)353 mm (13.9 inches)68%extreme
July Weather29°C (84°F)141 mm (5.5 inches)77%extreme
August Weather28°C (82°F)275 mm (10.8 inches)79%extreme
September Weather27°C (81°F)280 mm (11.0 inches)77%extreme
October Weather27°C (81°F)409 mm (16.1 inches)77%extreme
November Weather27°C (81°F)80 mm (3.2 inches)75%very high
December Weather27°C (81°F)4 mm (0.2 inches)66%very high

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