July weather forecast
Petersburg, VA

July is in the middle of summer, and at this time, Petersburg, Virginia showcases its warmest weather of the year. While the serene blue skies invite outdoor adventures, the city is sometimes interrupted by scattered thundershowers. The extended daylight and high UV index are native to this midsummer month. Moreover, temperatures climb precipitously, reaching the peak average of 90.1°F (32.3°C), the highest for the year.

Temperature

With average temperatures fluctuating between a high of 90.1°F (32.3°C) and a low of 69.4°F (20.8°C), July stands out as the warmest month in Petersburg.

Heat index

Throughout July, the heat index is computed to be a blisteringly hot 107.6°F (42°C). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
Always consider that heat index estimations are for light winds and places in the shade. 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 'felt air temperature', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

July is the least humid month in Petersburg, with an average relative humidity of 71%.

Rainfall

In Petersburg, in July, during 11.5 rainfall days, 0.75" (19mm) of precipitation is typically accumulated. Throughout the year, there are 109.6 rainfall days, and 9.96" (253mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall in Petersburg.

Daylight

In July, the average length of the day is 14h and 26min.
On the first day of the month, sunrise is at 5:53 am and sunset at 8:33 pm. On the last day of July, in Petersburg, sunrise is at 6:14 am and sunset at 8:17 pm EDT.

Sunshine

With an average of 10.7h of sunshine, July has the most sunshine of the year in Petersburg.

UV index

The month with the highest UV index is July, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 7 in July transforms into the following instructions:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.