September weather forecast
San Francisco Chinameca, El Salvador

In September, conditions start to change again, with the rainfall decreasing to an average of 150mm (5.91") over 26.5 days, though it remains significantly high. While the overall conditions remain consistent with the high humidity and warm temperatures synonymous with this time, a notable reduction in wind speed plays a substantial role in tempering conditions. As with the previous month, the visibility remains lower than usual due to relatively higher cloud coverage. On average, the number of sunlight hours begins to decline slightly, an identifiable sign of the upcoming changes in seasonal patterns. Despite the lessening rainfall, the monsoon influence continues to echo from August, with longer rainy periods and high atmospheric pressure.

Temperature

September's climate in San Francisco Chinameca shows a minor adjustment in average high-temperatures to a still tropical 30.5°C (86.9°F) from August's 31.6°C (88.9°F). In San Francisco Chinameca, September's nights observe an average temperature dip to an agreeable 20.9°C (69.6°F).

Heat index

The heat index in September is computed to be a scorching 40°C (104°F). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.
Heat index evaluations are typically in the context of light winds and shaded environments. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', reflects the feeling of heat when considering both air temperature and humidity. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

The months with the highest humidity are September and October, with an average relative humidity of 82%.

Rainfall

In San Francisco Chinameca, in September, during 26.5 rainfall days, 150mm (5.91") of precipitation is typically accumulated. In San Francisco Chinameca, during the entire year, the rain falls for 196.7 days and collects up to 1216mm (47.87") of precipitation.

Daylight

In San Francisco Chinameca, the average length of the day in September is 12h and 12min.
On the first day of September in San Francisco Chinameca, El Salvador, sunrise is at 05:44 and sunset at 18:07. On the last day of the month, sunrise is at 05:45 and sunset at 17:46 CST.

Sunshine

In September, the average sunshine is 9h.

UV index

The months with the lowest UV index in San Francisco Chinameca are May through December, 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 ordinary individuals.
Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. 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. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.