September weather forecast
La Union, El Salvador

The city of La Union in September carries on with August's weather traits. Meanwhile, rainfall increases to 148mm (5.83"), peaking the year's wettest period. Albeit the increase in rainfall, the ethereal beauty of the city does not fade. Winds slow down compared to August, maintaining the quiet and peaceful ambiance of the city. Amid pleasant temperatures and relatively high humidity, September encourages indoor activities and gastronomical explorations.

Temperature

The shift into September records an average high-temperature of a still tropical 31.8°C (89.2°F), subtly varied from August's 32.8°C (91°F). In September, La Union's temperature tends to fall to an average low of 23.5°C (74.3°F) during the night.

Heat index

The heat index value for September is evaluated at a blistering 43°C (109.4°F). Keep guard: Heat cramps and heat exhaustion are likely. Continued activity increases the risk of heatstroke.
Keep in mind the heat index values are meant for areas in shade and with light wind. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', comes about by integrating the temperature readings with the humidity levels. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. The body is at risk of dehydration and related complications when it fails to shed excessive heat.

Humidity

In La Union, the average relative humidity in September is 78%.

Rainfall

In September, the rain falls for 28.3 days. Throughout September, 148mm (5.83") of precipitation is accumulated. Throughout the year, in La Union, there are 201.6 rainfall days, and 974mm (38.35") of precipitation is accumulated.

Sea temperature

In La Union, El Salvador, in September, the average water temperature is 29.8°C (85.6°F).
Note: For swimming, diving, and similar activities, the water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered delightful, allowing for extended periods of enjoyment without discomfort.

Daylight

The average length of the day in September in La Union is 12h and 12min.
On the first day of the month, sunrise is at 05:40 and sunset at 18:02. On the last day of September, in La Union, sunrise is at 05:40 and sunset at 17:41 CST.

Sunshine

The average sunshine in September in La Union is 9.3h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in La Union. January through December, with an average maximum UV index of 7, are months with the lowest UV index in La Union. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: A daily high UV index of 7 in September leads to these guidelines:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be on guard! The reflective nature of sand and water boosts UV exposure.