Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The shift into September uncovers an average high-temperature of a still moderately hot 81.5°F (27.5°C), subtly different from the previous month. The nights of September anticipate an average low-temperature of 72.1°F (22.3°C).Heat index
During September, the heat index is estimated at a hot 87.8°F (31°C). If exposure and activity persist, fatigue could ensue, possibly leading to heat cramps.Know that the heat index computations account for shaded terrains and slight winds. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', gauges the sensation of temperature factoring in the air's moisture content. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Humidity
In Surfside Beach, South Carolina, the average relative humidity in September is 77%.Rainfall
In Surfside Beach, in September, it is raining for 16.9 days, with typically 4.8" (122mm) of accumulated precipitation. Throughout the year, there are 174.7 rainfall days, and 42.13" (1070mm) of precipitation is accumulated.Snowfall
March through December are months without snowfall.Daylight
In Surfside Beach, South Carolina, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:50 am and sunset at 7:40 pm. On the last day of September, sunrise is at 7:10 am and sunset at 7:01 pm EDT.
Sunshine
In Surfside Beach, the average sunshine in September is 9.4h.UV index
In Surfside Beach, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How many days does it rain in September in Surfside Beach?
When it does not snow?
How many hours of daylight does Surfside Beach have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Surfside Beach have in September?
What is the UV index reading in September?
Average temperature in September
Surfside Beach, SC
- Average high temperature in September: 81.5°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (54.7°F).
- Average low temperature in September: 72.1°F
The month with the highest average low temperature is July (76.5°F).
The coldest month (with the lowest average low temperature) is January (42.4°F).
Average pressure in September
Surfside Beach, SC
- Average pressure in September: 30"Hg
The months with the highest atmospheric pressure are January and December (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Surfside Beach, SC
- Average wind speed in September: 9.3mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (8.2mph).
Average humidity in September
Surfside Beach, SC
- Average humidity in September: 77%
The months with the highest relative humidity are May, June, August and December (78%).
The month with the lowest relative humidity is January (74%).
Average rainfall in September
Surfside Beach, SC
- Average rainfall in September: 4.8"
The wettest month (with the highest rainfall) is August (6.77").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in September
Surfside Beach, SC
- Average rainfall days in September: 16.9 days
The month with the highest number of rainy days is July (22.7 days).
The month with the least rainy days is November (9.6 days).
Average snowfall in September
Surfside Beach, SC
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.35").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Surfside Beach, SC
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.3 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
Surfside Beach, SC
- Average daylight in September: 12h and 2min
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: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Surfside Beach, SC
- Average sunshine days in September: 10.8 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is July (6 days).
Average UV index in September
Surfside Beach, SC
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and February (UV index 3).
Average cloud cover in September
Surfside Beach, SC
- Average cloud cover in September: 30
The months with the most cloud cover are February and December (Cloud cover 41).
The months with the least cloud cover are June and July (Cloud cover 27).
Average visibility in September
Surfside Beach, 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).
Surfside Beach, South Carolina, USA
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