July weather forecastNorth Charleston, SC

Weather in July

As far as North Charleston's weather goes, July marks the peak of summer with the highest temperature averages for the year. Expect temperatures to settle between 76.5°F (24.7°C) at its lowest and 89.6°F (32°C) at its highest. This weather is the warmest of the year, surpassing the conditions of June while hinting at the subsequent cooling trend of August. Despite the heat, the city maintains a cheerful atmosphere owing to extravagant Fourth of July celebrations. Beachgoers and sun-seekers can look forward to maximum sunshine hours and a heightened UV index during the long summer days.

Temperature

In North Charleston, July records the highest average temperatures, peaking at 89.6°F (32°C) and reaching a low of 76.5°F (24.7°C).

Heat index

During July, the heat index is estimated at a blistering 107.6°F (42°C). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are extremely vital to babies and toddlers. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

The average relative humidity in July is 74%.

Rainfall

In North Charleston, during July, the rain falls for 21.2 days and regularly aggregates up to 2.68" (68mm) of precipitation. Throughout the year, there are 154.4 rainfall days, and 23.43" (595mm) of precipitation is accumulated.

Snowfall

March through November are months without snowfall in North Charleston.

Daylight

The average length of the day in July in North Charleston is 14h and 4min.
On the first day of July, sunrise is at 6:15 am and sunset at 8:32 pm. On the last day of the month, sunrise is at 6:33 am and sunset at 8:19 pm EDT.

Sunshine

With an average of 10.9h of sunshine, July has the most sunshine of the year.

UV index

May 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 rays for the average person.
Note: A maximum UV index of 7 in July translates into the following recommendations:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Experience reduced UV exposure by about half when donning a wide-brim hat.