September weather forecast
Pinar del Río, Cuba

In September, Pinar del Río witnesses a gradual shift in weather, indicating the forthcoming autumn season. Despite this, high rainfall persists, although with a slightly lower volume compared to August's peak. Average temperatures reveal a subtle decrease, marking the start of the transition to cooler weather, yet remaining warm enough for outdoor activities. As autumn approaches, a notable shift in the climate can be observed despite the continued predominance of classic summer weather. Therefore, September can be seen as a crossover month, bringing cooler temperatures whilst holding onto summer's rain.

Temperature

September's arrival in Pinar del Río brings an average high-temperature of a still hot 31.2°C (88.2°F), demonstrating subtle variation from the preceding month. In Pinar del Río, an average nighttime temperature of 24.2°C (75.6°F) is expected during September.

Heat index

During September, the heat index is calculated to be a blisteringly hot 42°C (107.6°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
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. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly important for children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

In September, the average relative humidity is 80%.

Rainfall

In September, the rain falls for 25.9 days. Throughout September, 104mm (4.09") of precipitation is accumulated. In Pinar del Río, during the entire year, the rain falls for 211.9 days and collects up to 823mm (32.4") of precipitation.

Daylight

In Pinar del Río, the average length of the day in September is 12h and 16min.
On the first day of September in Pinar del Río, Cuba, sunrise is at 07:17 and sunset at 19:51. On the last day of the month, sunrise is at 07:26 and sunset at 19:22 CDT.

Sunshine

In September, the average sunshine in Pinar del Río is 9h.

UV index

April through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In September, a daily UV index of 7 turns into the following recommendations:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Stay sun-safe with clothing that is both closely woven and worn loosely.