September weather forecast
Chilanga, El Salvador

September, the first month of the autumn in Chilanga, is still a tropical month, with an average temperature fluctuating between 31.7°C (89.1°F) and 22.1°C (71.8°F).

Temperature

September's onset brings an average high-temperature of a still hot 31.7°C (89.1°F), showing a minute difference from August's 33°C (91.4°F). Throughout the nights in September, Chilanga experiences an average low-temperature of 22.1°C (71.8°F).

Heat index

The heat index for September is calculated to be an extremely hot 44°C (111.2°F). Stay on guard: Heat exhaustion and heat cramps are predicted. Ongoing effort can cause heatstroke.
Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are extremely significant for babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

The average relative humidity in September is 81%.

Rainfall

In Chilanga, during September, the rain falls for 25.8 days and regularly aggregates up to 122mm (4.8") of precipitation. In Chilanga, during the entire year, the rain falls for 188.2 days and collects up to 954mm (37.56") of precipitation.

Daylight

The average length of the day in September is 12h and 12min.
On the first day of September, sunrise is at 05:40 and sunset at 18:03. On the last day of the month, sunrise is at 05:41 and sunset at 17:42 CST.

Sunshine

In Chilanga, the average sunshine in September is 8.8h.

UV index

The months with the lowest UV index are September and October, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.