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

Toa Baja marks the onset of September with an average high-temperature of a still moderately hot 85.1°F (29.5°C), a subtle shift from August's 85.5°F (29.7°C). The nights of September cool down to an average low of 78.4°F (25.8°C), subtly lower than daytime highs.

Heat index

During September, the heat index is computed to be a very hot 96.8°F (36°C). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
Understand that the heat index values take into account shaded locations and mild winds. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', melds the effects of warmth and moisture to generate a feeling of heat. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. 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 are essentially critical for children. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

In September, the average relative humidity is 78%.

Rainfall

In Toa Baja, during September, the rain falls for 20.4 days and regularly aggregates up to 3.62" (92mm) of precipitation. Throughout the year, in Toa Baja, there are 223.5 rainfall days, and 27.95" (710mm) of precipitation is accumulated.

Daylight

The average length of the day in September in Toa Baja is 12h and 14min.
On the first day of September, 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

In September, the average sunshine in Toa Baja 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 value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In September, the maximum UV index of 7 translates into these guidelines:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.