September weather forecast
Hanahan, SC

In Hanahan, September acts as a buffer between the scorching summer and the onset of fall, with weather conditions beginning to moderate. Compared to August, September experiences a sharp reduction in rainfall, amounting to 4.02" (102mm), and a bit cooler temperatures. However, like the previous month, high temperatures and humidity levels remain, potentially impairing outdoor activities during the day. The transition from September to October brings significantly cooler temperatures, lower humidity levels and fewer daylight hours marking the arrival of fall. While the weather is still quite warm throughout September, the shorter days hint at the upcoming fall season.

Temperature

The onset of September in Hanahan marks an average high-temperature of a warm 85.1°F (29.5°C), hardly differing from August's 89.4°F (31.9°C). During the month of September, Hanahan experiences a steady low-temperature average of 70.9°F (21.6°C).

Heat index

Throughout September, the heat index is appraised at a torrid 95°F (35°C). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
Heat index details are generally centered around shaded locations and a mild breeze. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree 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 particularly relevant to babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. The body is at risk of dehydration and related complications when it fails to shed excessive heat.

Humidity

In Hanahan, the average relative humidity in September is 75%.

Rainfall

In Hanahan, during September, the rain falls for 16.5 days and regularly aggregates up to 4.02" (102mm) of precipitation. Throughout the year, in Hanahan, South Carolina, there are 172.6 rainfall days, and 39.13" (994mm) of precipitation is accumulated.

Snowfall

March through November are months without snowfall in Hanahan.

Daylight

In Hanahan, South Carolina, the average length of the day in September is 12h and 22min.
On the first day of the month, sunrise is at 6:55 am and sunset at 7:44 pm. On the last day of September, sunrise is at 7:13 am and sunset at 7:05 pm EDT.

Sunshine

In September, the average sunshine in Hanahan is 8.9h.

UV index

The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: A maximum daily UV index of 6 during September morphs into the following directions:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.