September weather forecast
Greenwood, LA

The first month of the autumn, September, is still a tropical month in Greenwood, Louisiana, with an average temperature ranging between min 67.8°F (19.9°C) and max 88.9°F (31.6°C).

Temperature

A moderate decline in average high-temperatures is noted in September, moving from a sweltering 95.2°F (35.1°C) in August to a hot 88.9°F (31.6°C). Throughout the month of September, Greenwood witnesses an average temperature of 67.8°F (19.9°C).

Heat index

Throughout September, the heat index is appraised at a very hot 102.2°F (39°C). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in September in Greenwood is 69%.

Rainfall

In Greenwood, in September, it is raining for 14.5 days, with typically 2.6" (66mm) of accumulated precipitation. Throughout the year, in Greenwood, there are 161.5 rainfall days, and 39.13" (994mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Greenwood are January through March, September, November and December. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Greenwood, during the entire year, snow falls for 3.4 days and aggregates up to 1.61" (41mm) of snow.

Daylight

In Greenwood, the average length of the day in September is 12h and 22min.
On the first day of the month, sunrise is at 6:51 am and sunset at 7:39 pm. On the last day of September, in Greenwood, sunrise is at 7:09 am and sunset at 7:01 pm CDT.

Sunshine

In September, the average sunshine in Greenwood is 9.4h.

UV index

In September, the average daily maximum UV index in Greenwood, Louisiana, is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.