September weather forecast
San Jose Guayabal, El Salvador

September consolidates itself as one of the wettest months in San Jose Guayabal, with the entire city blossoming in response to the rainfall. The average rainfall slightly drops to 150mm (5.91") compared to August, yet the bulk of days consist of sizeable showers. A marked increase in cloud coverage brings a slight decline in daylight hours. Yet, the city adorns its tropical identity with temperatures remaining consistent and inviting. As the city braves the rain, proceeding with caution during outdoor activities becomes imperative.

Temperature

The arrival of September coincides with an average high-temperature of a still tropical 30.5°C (86.9°F), indicating a minimal shift from August's 31.6°C (88.9°F). San Jose Guayabal's temperature lowers to a mean of 20.9°C (69.6°F) during the nights in September.

Heat index

September's mean heat index is computed to be a scorching 40°C (104°F). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
Always consider that heat index estimations are for light winds and places in the shade. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation of heat. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

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

Rainfall

In San Jose Guayabal, El Salvador, in September, it is raining for 26.5 days, with typically 150mm (5.91") of accumulated precipitation. In San Jose Guayabal, during the entire year, the rain falls for 196.7 days and collects up to 1216mm (47.87") of precipitation.

Daylight

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

Sunshine

In September, the average sunshine is 9h.

UV index

May through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum UV index of 6 during September leads to these instructions:
Prevent overexposure. Protection from the sun's harmful effects is needed. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Always opt for UVA and UVB-resistant sunglasses on radiant days.