September weather forecast
Cabo Rojo, PR

September weather in Cabo Rojo is a transition from the rains of August, with rainfall rates slightly reducing to 3.58" (91mm). However, the city continues to provide ample opportunities to make the most of the diverse weather. The inviting Cabo Rojo climate persistently encourages everyone to actively partake in the city's offerings.

Temperature

The shift from August to September is characterized by an average high-temperature of a still moderately hot 85.6°F (29.8°C), not significantly different from the 85.8°F (29.9°C) of August. Nighttime, during September, brings an average low of 78.6°F (25.9°C), a modest reduction from the day's peak.

Heat index

In September, the average heat index is calculated to be a very hot 96.8°F (36°C). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.
Consider that heat index readings are for situations in the shade and light wind. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. 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 particularly relevant to babies and toddlers. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

In September, the average relative humidity is 77%.

Rainfall

September is the month with the most rainfall. Rain falls for 21.7 days and accumulates 3.58" (91mm) 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 6:14 am and sunset at 6:42 pm. On the last day of September, sunrise is at 6:18 am and sunset at 6:17 pm AST.

Sunshine

In Cabo Rojo, the average sunshine in September is 9.3h.

UV index

The months with the highest UV index are March through November, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 7 during September translates into the following directions:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.