July weather forecastChesapeake, VA

Weather in July

July represents the quintessential Chesapeake summer, registering as the month with the highest average temperature at a scorching 86.4°F (30.2°C). Balmy days, heavy with heat, create the perfect backdrop for all manner of summer outdoor activities. This intense heat is somewhat moderated by the relatively high sea temperature that reaches 78.2°F (25.7°C) in July - the highest of the entire year. With the inflow of warmth, and the frequent occurrence of summer storms, the city is bathed in a unique blend of scalding sun and resounding showers. Even though the relentless beating down of the sun can be overwhelming at times, the plethora of summer festivals and activities on offer make July a joyous time for locals and visitors alike.

Temperature

With its high average temperature of 86.4°F (30.2°C) and a low of 73.6°F (23.1°C), July is regarded as the warmest month.

Heat index

The heat index value during July is evaluated at a very hot 98.6°F (37°C). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
Heat index guidelines indicate values are for light wind scenarios and shaded regions. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. 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. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

July and November, with an average relative humidity of 74%, are the least humid months.

Rainfall

In Chesapeake, during July, the rain falls for 17.4 days and regularly aggregates up to 2.2" (56mm) of precipitation. Throughout the year, there are 151.9 rainfall days, and 20.35" (517mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Ocean temperature

In Chesapeake, in July, the average water temperature is 78.3°F (25.7°C).
Note: Water surface temperatures from 77°F (25°C) to 84.2°F (29°C) are considered optimal and extremely delightful for long-lasting pleasure in any water activity.

Daylight

In Chesapeake, the average length of the day in July is 14h and 23min.
On the first day of July, sunrise is at 5:50 am and sunset at 8:28 pm. On the last day of the month, sunrise is at 6:10 am and sunset at 8:12 pm EDT.

Sunshine

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

UV index

July and 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 vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In July, a daily maximum UV index of 7 leads to the following instructions:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Caution! Sand and water reflections can notably increase the UV radiation intensity.