July weather forecast
Portsmouth, VA

July's illustrious zenith of the sunny season in Portsmouth brings forth the year's highest temperatures, averaging 86.4°F (30.2°C) as the high. A notable UV index of 7 indicates the health-aware populace about the intense sun. Picnics, barbecues, and outdoor activities dominate this part of the year. Contrasting the outdoor humidity, residents often resort to air-conditioned premises in their attempt to beat the heat. As such, July in Portsmouth becomes a hub of summer activities both indoors and outdoors.

Temperature

July stands out as Portsmouth's warmest month, with temperatures ranging between an average high of 86.4°F (30.2°C) and a low of 73.6°F (23.1°C).

Heat index

For most parts of July, the heat index is evaluated at a sweltering 98.6°F (37°C). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
One should consider that heat index numbers are for shaded settings and light wind. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', offers an insight into how hot it feels when we factor in moisture content. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation of heat. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

The months with the lowest humidity in Portsmouth are July and November, with an average relative humidity of 74%.

Rainfall

In Portsmouth, in July, it is raining for 17.4 days, with typically 2.2" (56mm) of accumulated precipitation. In Portsmouth, during the entire year, the rain falls for 151.9 days and collects up to 20.35" (517mm) of precipitation.

Snowfall

April through October are months without snowfall in Portsmouth.

Ocean temperature

In Portsmouth, Virginia, the average seawater temperature in July is 78.3°F (25.7°C).
Note: For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

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

Sunshine

July has the most sunshine of the year in Portsmouth, with an average of 10.9h of sunshine.

UV index

The months with the highest UV index are July and August, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: An average maximum UV index of 7 in July leads to these recommendations:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Be wary! Reflections from sand and water make UV radiation more intense.