September weather forecast
Maricao, PR

September ushers autumn in Maricao, Puerto Rico, characterized by a slight escalation of weather extremities. The month is distinguished by the most rainfall all year, a hefty 4.49" (114mm), significantly higher than the preceding month. As a result, cloudy skies common during this month obscure the generous daylight hours. Despite the splash, temperatures remain mild, and wind speeds reduce. Transitioning into October, a decrease in rainfall coupled with a reduction in daylight hours is observed.

Temperature

The shift into September records an average high-temperature of a still warm 85.3°F (29.6°C), subtly varied from August's 85.6°F (29.8°C). A steady low-temperature average of 77.7°F (25.4°C) is logged during September, reflecting a modest dip from daytime readings.

Heat index

September's mean heat index is appraised at a very hot 96.8°F (36°C). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
Know that the heat index computations account for shaded terrains and slight winds. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

In September, the average relative humidity is 79%.

Rainfall

In Maricao, in September, it is raining for 21.4 days, with typically 4.49" (114mm) of accumulated precipitation. In Maricao, during the entire year, the rain falls for 225.3 days and collects up to 35.04" (890mm) of precipitation.

Daylight

The average length of the day in September is 12h and 14min.
On the first day of the month, sunrise is at 6:13 am and sunset at 6:41 pm. On the last day of September, sunrise is at 6:18 am and sunset at 6:17 pm AST.

Sunshine

In September, the average sunshine is 9.5h.

UV index

The months with the highest UV index are April through November, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the average person.
Note: In September, the maximum UV index of 7 suggests this advice:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.