August weather forecast
Rock Hill, SC

Rock Hill’s August weather continues to ride on the tails of summer, offering generous amounts of sunshine. Temperature highs remain elevated, though not as extreme as July, rendering an atmosphere conducive for outdoor activities. The city sees a rise in precipitation, with the month registering the highest rainfall of the year at 3.43" (87mm). Relative humidity is also high, lingering around 70%, which can lead to a sensation of greater warmth. In terms of daylight, August starts to see a reduction with daylight duration scaling down to 13.4 hours.

Temperature

August's advent presents an average high-temperature of a still tropical 88.9°F (31.6°C), indicating a slight variation from the conditions of the previous month. August nights in Rock Hill cool down to an average low-temperature of 69.4°F (20.8°C).

Heat index

August's mean heat index is computed to be a very hot 102.2°F (39°C). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
It is important to note that the heat index values are for shaded areas and light wind scenarios. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', blends air temperature and moisture content to represent the felt temperature to humans. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

In Rock Hill, the average relative humidity in August is 70%.

Rainfall

In Rock Hill, in August, it is raining for 16.8 days, with typically 3.43" (87mm) of accumulated precipitation. In Rock Hill, during the entire year, the rain falls for 159 days and collects up to 32.76" (832mm) of precipitation.

Snowfall

In Rock Hill, snow does not fall in April through November.

Daylight

In August, the average length of the day in Rock Hill is 13h and 26min.
On the first day of the month, sunrise is at 6:34 am and sunset at 8:26 pm. On the last day of August, sunrise is at 6:56 am and sunset at 7:51 pm EDT.

Sunshine

In Rock Hill, South Carolina, the average sunshine in August is 10.2h.

UV index

The average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: An average UV index of 6 in August transforms into this advice:
Shield from overexposure. Defense against sun-related harm is required. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Experience reduced UV exposure by about half when donning a wide-brim hat.