July weather forecast
Myrtle Beach, SC

July steps in with Myrtle Beach, South Carolina, being in the throes of summer, revealing the highest temperatures of the year. It is the peak of summer with average temperatures hitting a high of 86.7°F (30.4°C) and a low of 76.3°F (24.6°C). Rainfall also reaches its peak in July, with approximately 2.99" (76mm) scattered over about 19.8 days. Transitioning into August maintains a similar weather pattern, sustaining the high temperatures and notable humidity. With over 14.1 hours of daylight, high UV index, and sea temperatures peaking, July provides the quintessential summer experience, affirming Myrtle Beach as an enticing summer destination.

Temperature

Myrtle Beach registers the highest average temperatures during the month of July, with peaks of 86.7°F (30.4°C) and lows of 76.3°F (24.6°C).

Heat index

July's average heat index is estimated at a fiery hot 100.4°F (38°C). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', marries air temperature and humidity to produce a value illustrating perceived warmth. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

In Myrtle Beach, the average relative humidity in July is 77%.

Rainfall

In Myrtle Beach, in July, during 19.8 rainfall days, 2.99" (76mm) of precipitation is typically accumulated. Throughout the year, in Myrtle Beach, there are 166.5 rainfall days, and 28.78" (731mm) of precipitation is accumulated.

Snowfall

March through November are months without snowfall in Myrtle Beach.

Ocean temperature

In July, the average ocean temperature in Myrtle Beach is 82°F (27.8°C).
Note: For engaging in water activities including swimming and diving, temperatures from 77°F (25°C) to 84.2°F (29°C) are perceived as perfect, providing pleasure for extended durations.

Daylight

In Myrtle Beach, the average length of the day in July is 14h and 8min.
On the first day of the month, sunrise is at 6:09 am and sunset at 8:30 pm. On the last day of July, sunrise is at 6:27 am and sunset at 8:16 pm EDT.

Sunshine

The months with the most sunshine are July and August, with an average of 10.9h of sunshine.

UV index

June through August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 7 in July transforms into the following instructions:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. During bright days, sunglasses that offer UVA and UVB defense are recommended. Be cautious! Sand and water surfaces make the Sun's UV rays more potent.