July weather forecast
Yorktown, VA

The heart of summer beats in Yorktown during July. With daytime high temperatures reaching a peak of 87.8°F (31°C), it is the hottest month of the year in this city. The long sunny days, high ultraviolet index, and warm sea temperatures are ideal for beach enthusiasts, while the relatively low wind speeds warrant a calm summer. Despite the occasional rain showers, the number of sunshine hours offers ample opportunities for outdoor activities. The city certainly comes alive with summer mirth and merriment during July.

Temperature

July temperatures tend to peak at an average high of 87.8°F (31°C) and dip to a low of 72.3°F (22.4°C).

Heat index

The heat index in July is estimated at a very hot 100.4°F (38°C). Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.
For clarity, heat index numbers account for light winds and areas under shade. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

With an average relative humidity of 72%, July is the least humid month.

Rainfall

In Yorktown, in July, during 16.9 rainfall days, 3.31" (84mm) of precipitation is typically accumulated. Throughout the year, in Yorktown, there are 165.3 rainfall days, and 34.25" (870mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Ocean temperature

In July, the average ocean temperature in Yorktown is 78.1°F (25.6°C).
Note: For activities in the water such as swimming or diving, temperatures from 77°F (25°C) to 84.2°F (29°C) are considered optimal for prolonged enjoyment without discomfort.

Daylight

In Yorktown, the average length of the day in July is 14h and 26min.
On the first day of July, sunrise is at 5:49 am and sunset at 8:30 pm. On the last day of the month, sunrise is at 6:10 am and sunset at 8:14 pm EDT.

Sunshine

July has the most sunshine of the year, with an average of 10.8h of sunshine.

UV index

The months with the highest UV index in Yorktown are June and July, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: In July, the maximum UV index of 7 suggests this advice:
Guard oneself from overexposure. Defence against sun injury is vital. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Stay aware! UV radiation is magnified when reflecting off sand and water.