August weather forecast
Williamsburg, VA

August carries forward the warmth of summer in Williamsburg, with a slight drop in temperatures to between 69.8°F (21°C) and 86.5°F (30.3°C). However, with rainfall peaking at a year's high of 2.36" (60mm), this month can be particularly wet. The richness of nature comes into the full view as plant life continues to thrive under a 13.5-hour daylight period, making the city a sight to behold. Despite being a summer month, August subtly hints at the arrival of fall, as the days gradually start to shorten. Regardless, the weather stays pleasantly warm, inviting residents and tourists alike to continue their outdoor activities.

Temperature

The onset of August in Williamsburg, Virginia, manifests an average high-temperature of a still tropical 86.5°F (30.3°C), demonstrating a minor variation from the preceding month. During August, the temperature is averaged to a low of 69.8°F (21°C) at night.

Heat index

August's heat index is estimated at a torrid 98.6°F (37°C). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are largely significant for babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. 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. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

In August, the average relative humidity in Williamsburg, Virginia, is 75%.

Rainfall

August is the month with the most rainfall. Rain falls for 16.3 days and accumulates 2.36" (60mm) of precipitation.

Snowfall

In Williamsburg, snow does not fall in April through October.

Daylight

In August, the average length of the day in Williamsburg, Virginia, is 13h and 33min.
On the first day of the month, sunrise is at 6:12 am and sunset at 8:14 pm. On the last day of August, in Williamsburg, sunrise is at 6:37 am and sunset at 7:36 pm EDT.

Sunshine

In August, the average sunshine is 10.4h.

UV index

In Williamsburg, Virginia, the average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: In August, an average UV index of 6 transforms into the following instructions:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.