September weather forecast
Southport, LA

September, the first month of the autumn in Southport, is still a hot month, with temperature in the range of an average low of 75.2°F (24°C) and an average high of 86.5°F (30.3°C).

Temperature

The onset of September notes an average high-temperature of a still tropical 86.5°F (30.3°C), subtly shifted from August's 89.1°F (31.7°C). Southport's nights in September experience an average temperature drop to a moderately hot 75.2°F (24°C).

Heat index

Throughout September, the heat index is evaluated at a sweltering 98.6°F (37°C). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.
Heat index evaluations are typically in the context of light winds and shaded environments. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

The average relative humidity in September is 74%.

Rainfall

In September, in Southport, Louisiana, the rain falls for 10.9 days. Throughout September, 0.43" (11mm) of precipitation is accumulated. In Southport, during the entire year, the rain falls for 104.1 days and collects up to 8.39" (213mm) of precipitation.

Daylight

In September, the average length of the day is 12h and 20min.
On the first day of the month, sunrise is at 6:38 am and sunset at 7:22 pm. On the last day of September, in Southport, sunrise is at 6:53 am and sunset at 6:46 pm CDT.

Sunshine

In Southport, the average sunshine in September is 10.2h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 7 in September interprets into the following advice:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.