September weather forecast
Santa Ana, El Salvador

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Weather in September

September takes the city through some of the last phases of the rainy season, while retaining relatively lower temperatures. A majority of the days come with substantial rainfall, followed by short spans of sunshine. The lower wind speeds and higher humidity levels combined, reinforce the monsoon vibes. The average visibility reduces to 6km (3.7mi) due to the recurring precipitations. With the higher cloud covering of 57%, the skies often present dramatic sceneries.

Temperature

The shift to September in Santa Ana, El Salvador, signals an average high-temperature of a warm 29.3°C (84.7°F), subtly varied from August's 30°C (86°F). Santa Ana's average low-temperature is measured at an enjoyable 18.9°C (66°F) during September.

Heat index

For most parts of September, the heat index is evaluated at a sweltering 37°C (98.6°F). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
Remember that heat index calculations are made for conditions in the shade with light wind. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', arises from combining readings of air temperature and relative moisture content. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In September, the average relative humidity is 85%.

Rainfall

In Santa Ana, during September, the rain falls for 24.7 days and regularly aggregates up to 141mm (5.55") of precipitation. In Santa Ana, El Salvador, during the entire year, the rain falls for 181.4 days and collects up to 1055mm (41.54") of precipitation.

Daylight

In September, the average length of the day is 12h and 12min.
On the first day of September, sunrise is at 05:46 and sunset at 18:09. On the last day of the month, sunrise is at 05:47 and sunset at 17:48 CST.

Sunshine

The average sunshine in September is 7.8h.

UV index

With an average maximum UV index of 5, September is the month with the lowest UV index. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index of 5 in September converts into the following recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
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Frequently asked questions

How hot does it get in Santa Ana in September?

The average high-temperature, in September, in Santa Ana, is 29.3°C (84.7°F), while the average low-temperature is 18.9°C (66°F). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which represents the influence of relative humidity on air temperature, in September is evaluated at 37°C (98.6°F).

What is the average humidity in September in Santa Ana?

In Santa Ana, El Salvador, the average relative humidity in September is 85%.

How much does it rain in Santa Ana in September?

In Santa Ana, El Salvador, in September, during 24.7 rainfall days, 141mm (5.55") of precipitation is typically accumulated.

What is the average length of the day in September in Santa Ana?

The average day length in September in Santa Ana, El Salvador, is 12h and 12min.

When is the sunrise / sunset in September in Santa Ana?

In September, on the first day of the month, sunrise is at 05:46 and sunset at 18:09. On the last day of the month, in Santa Ana, sunrise is at 05:47 and sunset at 17:48 CST.

How long on average sun shines in September in Santa Ana?

In September, the average sunshine duration in Santa Ana is 7.8h.

When is the lowest UV index in Santa Ana?

September is the month with the lowest UV index in Santa Ana, with an average maximum UV index of 5.

What is the UV index intensity in September in Santa Ana?

In September, the average daily maximum UV index in Santa Ana, El Salvador, is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.

Average temperature in September
Santa Ana, El Salvador

Average temperature in September - Santa Ana, El Salvador
  • Average high temperature in September: 29.3°C

The warmest month (with the highest average high temperature) is April (33.2°C).
The month with the lowest average high temperature is October (27.9°C).

  • Average low temperature in September: 18.9°C

The month with the highest average low temperature is May (20.7°C).
The coldest month (with the lowest average low temperature) is January (16.3°C).

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Average pressure in September
Santa Ana, El Salvador

Average pressure in September - Santa Ana, El Salvador
  • Average pressure in September: 1011.8mbar

The month with the highest atmospheric pressure is January (1014.2mbar).
The months with the lowest atmospheric pressure are May and October (1011.7mbar).

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Average wind speed in September
Santa Ana, El Salvador

Average wind speed in September - Santa Ana, El Salvador
  • Average wind speed in September: 4.2km/h

The windiest month (with the highest average wind speed) is January (9km/h).
The calmest month (with the lowest average wind speed) is September (4.2km/h).

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Average humidity in September
Santa Ana, El Salvador

Average humidity in September - Santa Ana, El Salvador
  • Average humidity in September: 85%

The month with the highest relative humidity is October (86%).
The month with the lowest relative humidity is March (63%).

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Average rainfall in September
Santa Ana, El Salvador

Average rainfall in September - Santa Ana, El Salvador
  • Average rainfall in September: 141mm

The wettest month (with the highest rainfall) is May (198mm).
The driest month (with the least rainfall) is January (2mm).

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Average rainfall days in September
Santa Ana, El Salvador

Average rainfall days in September - Santa Ana, El Salvador
  • Average rainfall days in September: 24.7 days

The month with the highest number of rainy days is June (25 days).
The month with the least rainy days is January (1.9 days).

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Average daylight in September /
Average sunshine in September
Santa Ana, El Salvador

Average daylight in September / Average sunshine in September - Santa Ana, El Salvador
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 18min).

  • Average sunshine in September: 7h and 5min

The month with the most sunshine is April (Average sunshine: 11h and 18min).
The month with the least sunshine is October (Average sunshine: 7h and 12min).

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Average sunshine days in September
Santa Ana, El Salvador

Average sunshine days in September - Santa Ana, El Salvador
  • Average sunshine days in September: 3.7 days

The months with the most sunshine days are January and December (28.5 days).
The month with the least sunshine days is September (3.7 days).

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Average UV index in September
Santa Ana, El Salvador

Average UV index in September - Santa Ana, El Salvador
  • Average UV index in September: 5

The months with the highest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 6).
The month with the lowest UV index is September (UV index 5).

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Average cloud cover in September
Santa Ana, El Salvador

Average cloud cover in September - Santa Ana, El Salvador
  • Average cloud cover in September: 57

The month with the most cloud cover is September (Cloud cover 57).
The month with the least cloud cover is January (Cloud cover 17).

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Average visibility in September
Santa Ana, El Salvador

Average visibility in September - Santa Ana, El Salvador
  • Average visibility in September: 6km

The months with the highest visibility are February, March and April (10km).
The month with the lowest visibility is September (6km).

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Santa Ana, El Salvador

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