September weather forecast
Rio Arriba, Dominican Republic

The first month of the autumn, September, is still a hot month in Rio Arriba, Dominican Republic, with an average temperature fluctuating between 30.3°C (86.5°F) and 23.2°C (73.8°F).

Temperature

On the advent of September, Rio Arriba's average high-temperature exhibits a minor adjustment to a still tropical 30.3°C (86.5°F) from August's 30.5°C (86.9°F). Rio Arriba in September experiences a low-temperature average of 23.2°C (73.8°F).

Heat index

September's heat index is evaluated at a fiery hot 39°C (102.2°F). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. 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 'apparent temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

The months with the highest humidity are September through December, with an average relative humidity of 81%.

Rainfall

In September, in Rio Arriba, Dominican Republic, the rain falls for 15.8 days. Throughout September, 47mm (1.85") of precipitation is accumulated. Throughout the year, there are 168.6 rainfall days, and 443mm (17.44") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 14min.
On the first day of September, sunrise is at 06:26 and sunset at 18:55. On the last day of the month, sunrise is at 06:31 and sunset at 18:30 AST.

Sunshine

September and November, with an average of 9.4h of sunshine, are months with the most sunshine in Rio Arriba.

UV index

May through July, September and October, with an average maximum UV index of 7, are months with the highest UV index in Rio Arriba. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high UV index of 7 in September translates into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.