September weather forecastSeabrook, SC
September
Weather in September
September, the first month of the autumn in Seabrook, is also a moderately hot month, with an average temperature ranging between max 85.8°F (29.9°C) and min 70.9°F (21.6°C).Temperature
With the onset of September, Seabrook's average high-temperature clocks in at a moderately hot 85.8°F (29.9°C), showing a minor fluctuation from the previous month. Nightly temperatures drop to an average low of 70.9°F (21.6°C) in September.Heat index
In September, the average heat index is appraised at a fiery hot 96.8°F (36°C). Implement enhanced safety actions, heat cramps and heat exhaustion could occur. Sustained activity might result in heatstroke.Consider that heat index readings are for situations in the shade and light wind. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is achieved by amalgamating air temperature with the relative humidity readings. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.
Humidity
In Seabrook, the average relative humidity in September is 75%.Rainfall
In September, in Seabrook, the rain falls for 15.9 days. Throughout September, 3.07" (78mm) of precipitation is accumulated. Throughout the year, in Seabrook, there are 166.9 rainfall days, and 33.9" (861mm) of precipitation is accumulated.Snowfall
In Seabrook, South Carolina, snow does not fall in February through December.Daylight
In Seabrook, the average length of the day in September is 12h and 22min.On the first day of September in Seabrook, sunrise is at 6:58 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 7:08 pm EDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
In Seabrook, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.Note: During September, 6 as the daily maximum UV index converts into the following advice:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Seabrook, SC
- Average high temperature in September: 85.8°F
The warmest month (with the highest average high temperature) is July (90.9°F).
The month with the lowest average high temperature is January (57.7°F).
- Average low temperature in September: 70.9°F
The months with the highest average low temperature are July and August (75.6°F).
The coldest month (with the lowest average low temperature) is January (42.6°F).
Average pressure in September
Seabrook, SC
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).
Average wind speed in September
Seabrook, SC
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is April (7.2mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Seabrook, SC
- Average humidity in September: 75%
The month with the highest relative humidity is December (77%).
The months with the lowest relative humidity are January and March (71%).
Average rainfall in September
Seabrook, SC
- Average rainfall in September: 3.07"
The wettest month (with the highest rainfall) is August (4.76").
The driest month (with the least rainfall) is January (1.54").
Average rainfall days in September
Seabrook, SC
- Average rainfall days in September: 15.9 days
The month with the highest number of rainy days is August (23.3 days).
The month with the least rainy days is November (7.5 days).
Average snowfall in September
Seabrook, SC
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Seabrook, SC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Seabrook, 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 6min).
- Average sunshine in September: 8h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Seabrook, SC
- Average sunshine days in September: 11.2 days
The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is August (5.2 days).
Average UV index in September
Seabrook, SC
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in September
Seabrook, SC
- Average cloud cover in September: 31
The months with the most cloud cover are February and December (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Seabrook, 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).
