July weather forecast
Sterling, VA

July is the epitome of summer in Sterling, Virginia, boasting the hottest temperatures during the year and hitting a high of 87.8°F (31°C). Despite the relative humidity, the outdoor activity remains quite high, with people enjoying beach trips or pool parties. The weather conditions can be extreme at times, so measures for heat protection are often warranted. The city stays vibrant, exploiting the optimal daylight hours at its disposal. Being the height of the summer season, July offers a unique charm, portraying the city in its full summer spirit.

Temperature

July brings the highest temperatures, with an average high of 87.8°F (31°C) and an average low of 67.3°F (19.6°C).

Heat index

July's mean heat index is calculated to be a fiery hot 100.4°F (38°C). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', is the outcome of merging air's temperature and its humidity metrics. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

With an average relative humidity of 70%, July is the least humid month in Sterling.

Rainfall

In Sterling, during July, the rain falls for 16.3 days and regularly aggregates up to 3.03" (77mm) of precipitation. Throughout the year, in Sterling, there are 158.1 rainfall days, and 31.46" (799mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall in Sterling.

Daylight

In Sterling, the average length of the day in July is 14h and 35min.
On the first day of July in Sterling, sunrise is at 5:48 am and sunset at 8:39 pm. On the last day of the month, sunrise is at 6:10 am and sunset at 8:21 pm EDT.

Sunshine

The month with the most sunshine in Sterling, Virginia, is July, with an average of 10.7h of sunshine.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Sterling. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: A daily high UV index of 6 in July leads to these guidelines:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. To cut down UV radiation exposure by about half, sport a wide-brim hat.