September weather forecastOkatie, SC
September
Weather in September
The first month of the autumn, September, is still a warm month in Okatie, South Carolina, with an average temperature ranging between max 85.3°F (29.6°C) and min 70.7°F (21.5°C).Temperature
With the onset of September, the average high-temperature registers at a moderately hot 85.3°F (29.6°C), subtly different from August's 90.1°F (32.3°C). In the month of September, the average low-temperature usually rests at a pleasant 70.7°F (21.5°C).Heat index
The heat index in September is evaluated at a torrid 95°F (35°C). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.One should be cognizant that the heat index values are tailored for shaded spots and mild winds. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is found by incorporating humidity levels into the air temperature measurement. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.
Humidity
The average relative humidity in September is 76%.Rainfall
In Okatie, in September, it is raining for 10.9 days, with typically 0.71" (18mm) of accumulated precipitation. In Okatie, South Carolina, during the entire year, the rain falls for 117.5 days and collects up to 10.79" (274mm) of precipitation.Snowfall
In Okatie, snow does not fall in January through November.Daylight
In September, the average length of the day is 12h and 22min.On the first day of September in Okatie, South Carolina, sunrise is at 6:59 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:09 pm EDT.
Sunshine
In Okatie, the average sunshine in September is 8.6h.UV index
The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the average person.Note: A daily high UV index of 6 in September leads to these guidelines:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Okatie, SC
- Average high temperature in September: 85.3°F
The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (57.7°F).
- Average low temperature in September: 70.7°F
The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (42.4°F).
Average pressure in September
Okatie, 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
Okatie, SC
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Okatie, SC
- Average humidity in September: 76%
The months with the highest relative humidity are August and December (77%).
The months with the lowest relative humidity are January and March (72%).
Average rainfall in September
Okatie, SC
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is August (1.77").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in September
Okatie, SC
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is July (16.4 days).
The month with the least rainy days is November (4.8 days).
Average snowfall days in September
Okatie, SC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Okatie, SC
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 12min).
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: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Okatie, SC
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is November (23.8 days).
The month with the least sunshine days is August (9.5 days).
Average UV index in September
Okatie, SC
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in September
Okatie, SC
- Average cloud cover in September: 29
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
Okatie, 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).
