September weather forecast
Jefferson, LA

September, the first month of the autumn in Jefferson, is still a tropical 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 dawn of September sees an average high-temperature of a still tropical 86.5°F (30.3°C), subtly contrasting with August's 89.1°F (31.7°C). In the month of September, an average of 75.2°F (24°C) marks the low-temperature.

Heat index

September's heat index is computed to be a sweltering 98.6°F (37°C). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent 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 sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

The average relative humidity in September in Jefferson, Louisiana, is 74%.

Rainfall

In Jefferson, in September, it is raining for 10.9 days, with typically 0.43" (11mm) of accumulated precipitation. Throughout the year, in Jefferson, there are 104.1 rainfall days, and 8.39" (213mm) of precipitation is accumulated.

Daylight

In September, the average length of the day in Jefferson, Louisiana, 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, sunrise is at 6:53 am and sunset at 6:46 pm CDT.

Sunshine

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

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Jefferson. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: A daily maximum UV index of 7 in September translates into the following instructions:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.