September weather forecast
Jefferson, LA

September, the first month of the autumn in Jefferson, is still a tropical month, with an average temperature varying between 75.2°F (24°C) and 86.5°F (30.3°C).

Temperature

With September's advent, Jefferson, Louisiana, sees 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). Jefferson's nighttime temperature in September drops to an average of 75.2°F (24°C).

Heat index

The average heat index in September is computed to be a sweltering 98.6°F (37°C). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

The average relative humidity in September is 74%.

Rainfall

In September, the rain falls for 10.9 days. Throughout September, 0.43" (11mm) of precipitation is accumulated. Throughout the year, there are 104.1 rainfall days, and 8.39" (213mm) of precipitation is accumulated.

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, 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

The months with the highest UV index are May through September, 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 average person.
Note: The maximum daily UV index of 7 during September translates into the following directions:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.