September weather forecast
Toa Baja, PR

As September arrives, the weather in Toa Baja, Puerto Rico, remains consistent with the previous month. Warming temperatures, intermittent showers, and a gentle sea breeze define the city's climate. Rainfall attains its peak at 3.62" (92mm), aiding the lush greenery in maintaining its verdant display. Sunshine and daylight are adequate for outdoor enjoyment. The climate during September is consistent, making the shift to October quite seamless.

Temperature

The high-temperature average in September for Toa Baja is a still moderately hot 85.1°F (29.5°C), staying closely aligned with August's conditions. Toa Baja encounters a small divergence from daytime high temperatures, averaging a low-temperature of 78.4°F (25.8°C) during September nights.

Heat index

Throughout September, the heat index is calculated to be a sweltering 96.8°F (36°C). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

In September, the average relative humidity is 78%.

Rainfall

In September, the rain falls for 20.4 days. Throughout September, 3.62" (92mm) of precipitation is accumulated. Throughout the year, there are 223.5 rainfall days, and 27.95" (710mm) of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 14min.
On the first day of September in Toa Baja, sunrise is at 6:10 am and sunset at 6:39 pm. On the last day of the month, sunrise is at 6:15 am and sunset at 6:14 pm AST.

Sunshine

The average sunshine in September is 9.4h.

UV index

May through November, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index, 7 in September, converts into the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.