Myrtle Beach
South Carolina, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Myrtle Beach, SC

The glorious Myrtle Beach in South Carolina, with lit city buildings
The glorious Myrtle Beach in South Carolina, with lit city buildings
September, the first month of the autumn, in Myrtle Beach, is also a moderately hot month, with temperature in the range of an average high of 83.7°F (28.7°C) and an average low of 65.8°F (18.8°C).

Temperature

In September, the average high-temperature is relatively the same as in August - a moderately hot 83.7°F (28.7°C). In Myrtle Beach, the average low-temperature is 65.8°F (18.8°C).

Rainfall

The month with the most rainfall is September when the rain falls for 8.4 days and typically aggregates up to 6.3" (160.8mm) of precipitation.

Snowfall

Throughout the year, 0.7" (17.7mm) of snow is accumulated.

Ocean temperature

In Myrtle Beach, South Carolina, the average seawater temperature is 80.6°F (27°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In Myrtle Beach, the average length of the day is 12.4h.

Sunshine

The average sunshine in Myrtle Beach, South Carolina, is 8h.

UV index

In September, the average daily maximum UV index in Myrtle Beach, South Carolina, is 8. A UV Index estimate of 8 to 10 represents a very high health hazard from the exposure to the Sun's UV radiation for average individuals.
The average daily UV index of 8 transform into the following instructions:
Take extra precautions. Protection against sun damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in September in Myrtle Beach?

In September, in Myrtle Beach, the average high-temperature is 83.7°F (28.7°C), and the average low-temperature is 65.8°F (18.8°C).

How much does it rain in Myrtle Beach in September?

In Myrtle Beach, South Carolina, in September, it is raining for 8.4 days, with typically 6.3" (160.8mm) of accumulated precipitation.

What is the rainiest month in Myrtle Beach?

September is the month with the most rainfall. Rain falls for 8.4 days and accumulates 6.3" (160.8mm) of precipitation.

How warm is the water in September in Myrtle Beach?

In September, the average ocean temperature is 80.6°F (27°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the average length of the day in September in Myrtle Beach?

In Myrtle Beach, South Carolina, the average length of the day in September is 12.4h.

How long on average sun shines in September in Myrtle Beach?

In Myrtle Beach, South Carolina, the average sunshine in September is 8h.

What is the UV index intensity in September in Myrtle Beach?

In Myrtle Beach, South Carolina, the average daily maximum UV index in September is 8. A UV Index estimate of 8 to 10 represents a very high health risk from unprotected exposure to the UV radiation.
Average temperature in September - Myrtle Beach, SC
  • Average high temperature in September: 83.7°F

The warmest month (with the highest average high temperature) is July (87.7°F).
The month with the lowest average high temperature is January (56.3°F).

  • Average low temperature in September: 65.8°F

The month with the highest average low temperature is July (72.8°F).
The coldest month (with the lowest average low temperature) is January (36.7°F).

Average rainfall in September - Myrtle Beach, SC
  • Average rainfall in September: 6.3"

The wettest month (with the highest rainfall) is September (6.3").
Driest months (with the lowest rainfall) are April and November (2.5").

Average rainfall days in September - Myrtle Beach, SC
  • Average rainfall days in September: 8.4 days

The month with the highest number of rainy days is August (10.6 days).
The month with the lowest number of rainy days is November (5.7 days).

Average snowfall in September - Myrtle Beach, SC
  • Average snowfall in September: 0"

The month with the highest snowfall is December (0.6").
Months with the lowest snowfall are January, March, April, May, June, July, August, September, October and November (0").

Average snowfall days in September - Myrtle Beach, SC
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (0.1 days).
Months with the lowest number of snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

Average sea temperature in September - Myrtle Beach, SC
  • Average sea temperature in September: 80.5°F

The best month for swimming (with the highest average sea temperature) is August (82.9°F).
The coldest month (with the lowest average sea temperature) is March (57.7°F).

Average daylight in September / Average sunshine in September - Myrtle Beach, SC
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 8h

Months with most sunshine are April, May, June and July (Average sunshine: 9h).
Months with least sunshine are January, November and December (Average sunshine: 6).

Average UV index in September - Myrtle Beach, SC
  • Average UV index in September: 8

Months with the highest UV index are June, July and August (UV index 10).
Months with the lowest UV index are January and December (UV index 3).