July weather forecast
Port Royal, SC

In July, Port Royal exhibits its peak summer conditions, with temperatures, humidity, and rainfall reaching significant values. The temperature tends to fluctuate between 76.5°F (24.7°C) and 89.6°F (32°C), the hottest in the year. Consequently, this makes July the best month for water-oriented activities. The longer days, high temperatures, and warm sea temperatures mean that July is the month where most people take to the water to cool off.

Temperature

July, having an average high-temperature of 89.6°F (32°C) and an average low-temperature of 76.5°F (24.7°C), is the warmest month.

Heat index

Throughout July, the heat index is estimated at a scorching 107.6°F (42°C). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
Heat index determinations are made taking into account the shade and light air movements. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

In Port Royal, the average relative humidity in July is 75%.

Rainfall

In Port Royal, in July, during 19.7 rainfall days, 2.68" (68mm) of precipitation is typically accumulated. Throughout the year, there are 154.7 rainfall days, and 23.11" (587mm) of precipitation is accumulated.

Snowfall

In Port Royal, snow does not fall in March through November.

Daylight

In Port Royal, the average length of the day in July is 14h and 2min.
On the first day of July in Port Royal, sunrise is at 6:19 am and sunset at 8:33 pm. On the last day of the month, sunrise is at 6:37 am and sunset at 8:21 pm EDT.

Sunshine

July has the most sunshine of the year, with an average of 11.2h of sunshine.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In July, the average maximum UV index of 7 translates into the following recommendations:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.