September weather forecast
Alexandria, LA

September brings a noticeable dip in temperature from the heat of August, marking the inception of cooler weather in Alexandria, Louisiana. The fall season introduces fewer daylight hours and declining humidity rates, presenting more agreeable weather conditions. Transitioning through the month, the city observes the last of the summer showers, with noticeable rainfall reduction. Despite the decrease in sunshine hours from August, September holds onto many clear-sky days. October continues this gradual decline in temperatures and further reduction in rainfall setting the course for the impending winter months.

Temperature

September registers an average high-temperature of a still tropical 88°F (31.1°C), slightly varied from August's 92.8°F (33.8°C). Alexandria's average low-temperature during September nights is observed to be a pleasant 68°F (20°C).

Heat index

Throughout September, the heat index is estimated at a blistering 104°F (40°C). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.
The metrics for the heat index are tailored for both shady environments and light winds. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', embodies the combination of air temperature and moisture content to illustrate perceived heat. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

In Alexandria, the average relative humidity in September is 76%.

Rainfall

In Alexandria, in September, it is raining for 14.8 days, with typically 2.44" (62mm) of accumulated precipitation. In Alexandria, during the entire year, the rain falls for 164.9 days and collects up to 35.43" (900mm) of precipitation.

Snowfall

March through November are months without snowfall.

Daylight

The average length of the day in September is 12h and 20min.
On the first day of the month, sunrise is at 6:46 am and sunset at 7:32 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:55 pm CDT.

Sunshine

The average sunshine in September is 9.4h.

UV index

The average daily maximum UV index in September is 6. 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: A maximum daily UV index of 6 during September morphs into the following directions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.