September weather forecast
La Romana, Dominican Republic

September marks the transition from the wet to the dry season in La Romana. The changeover period means that warm temperatures continue while humidity takes a slight dip offering respite. The sea temperature is at its warmest urging beach lovers and divers to take advantage. However, rainfall remains high indicating carrying of rain-gear a necessity. Temperatures fluctuate between 24.5°C (76.1°F) to 30.7°C (87.3°F) and the average rainfall is 78mm (3.07").

Temperature

La Romana's shift into September is marked by a subtle change to a still hot 30.7°C (87.3°F) from August's 31.3°C (88.3°F) in temperature. During September, La Romana consistently records a temperature low averaging a moderately hot 24.5°C (76.1°F).

Heat index

Throughout September, the heat index is calculated to be a blisteringly hot 40°C (104°F). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
Heat index specifics point out values are for conditions of shade and a slight breeze. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', blends air temperature and moisture content to represent the felt temperature to humans. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

The average relative humidity in September in La Romana, Dominican Republic, is 80%.

Rainfall

In La Romana, in September, it is raining for 20.8 days, with typically 78mm (3.07") of accumulated precipitation. In La Romana, during the entire year, the rain falls for 233.5 days and collects up to 632mm (24.88") of precipitation.

Sea temperature

September is the month with the warmest seawater in La Romana, with an average sea temperature of 29.4°C (84.9°F).
Note: Temperatures between 25°C (77°F) and 29°C (84.2°F) are ideal for swimming, diving, and similar water activities, ensuring pleasure and comfort for extended periods without feeling uneasy.

Daylight

The average length of the day in September is 12h and 14min.
On the first day of September in La Romana, sunrise is at 06:21 and sunset at 18:49. On the last day of the month, sunrise is at 06:26 and sunset at 18:24 AST.

Sunshine

The average sunshine in September is 9.2h.

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 threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 7 in September translates into these instructions:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Beware! Reflecting off water and sand, UV rays are much stronger.