September weather forecastMcClellanville, SC
September
Weather in September
September, the first month of the autumn in McClellanville, is also a moderately hot month, with an average temperature ranging between min 69.6°F (20.9°C) and max 84.2°F (29°C).Temperature
The average high-temperature in September, at a moderately hot 84.2°F (29°C), reveals a modest deviation from August's 88.7°F (31.5°C). Throughout September nights, McClellanville registers an average low-temperature of 69.6°F (20.9°C).Heat index
September's heat index is evaluated at a hot 93.2°F (34°C). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.In the scope of the heat index, its values resonate with shade and light wind conditions. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', gives a temperature feeling by integrating air temperature and humidity. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. 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 children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Humidity
The average relative humidity in September in McClellanville is 77%.Rainfall
In McClellanville, in September, during 17.9 rainfall days, 4.29" (109mm) of precipitation is typically accumulated. Throughout the year, there are 179.9 rainfall days, and 40.94" (1040mm) of precipitation is accumulated.Snowfall
In McClellanville, snow does not fall in March through November.Daylight
In McClellanville, South Carolina, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:52 am and sunset at 7:42 pm. On the last day of September, in McClellanville, sunrise is at 7:11 am and sunset at 7:03 pm EDT.
Sunshine
In September, the average sunshine in McClellanville 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 vulnerability from unsafe exposure to UV radiation for average individuals.Note: The UV index of 6 in September translates into these instructions:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
McClellanville, SC
- Average high temperature in September: 84.2°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (55.8°F).
- Average low temperature in September: 69.6°F
The month with the highest average low temperature is July (74.8°F).
The coldest month (with the lowest average low temperature) is January (40.8°F).
Average pressure in September
McClellanville, SC
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
McClellanville, SC
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
McClellanville, SC
- Average humidity in September: 77%
The months with the highest relative humidity are August and December (78%).
The months with the lowest relative humidity are January and March (74%).
Average rainfall in September
McClellanville, SC
- Average rainfall in September: 4.29"
The wettest month (with the highest rainfall) is August (6.46").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in September
McClellanville, SC
- Average rainfall days in September: 17.9 days
The months with the highest number of rainy days are July and August (23.2 days).
The month with the least rainy days is November (8.9 days).
Average snowfall in September
McClellanville, SC
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.24").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
McClellanville, SC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.5 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
McClellanville, SC
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 8h and 54min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
McClellanville, SC
- Average sunshine days in September: 9.8 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is July (5.5 days).
Average UV index in September
McClellanville, SC
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
McClellanville, SC
- Average cloud cover in September: 31
The months with the most cloud cover are February and December (Cloud cover 40).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in September
McClellanville, SC
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
