July weather forecast
Manassas, VA

July in Manassas is characterized by sweltering summer temperatures, making it the hottest month of the year. The temperature high blazes at 88.3°F (31.3°C), and nights provide little relief, with the low barely dipping below 67.1°F (19.5°C). While the heat intensifies, the number of rainfall days edge up slightly, offering some respite from the scorching summer weather. The heightened UV index warns of stronger sunlight and the need for sun safety practices. The mid-year month encourages residents to seek shelter in cooler indoor sanctuaries and enjoy evening activities after sundown.

Temperature

July, with its average high-temperature of 88.3°F (31.3°C) and an average low-temperature of 67.1°F (19.5°C), holds the record as the warmest month in Manassas, Virginia.

Heat index

In July, the average heat index is evaluated at a sweltering 102.2°F (39°C). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
When assessing, remember that heat index measurements are for light winds and shaded spots. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

July is the least humid month in Manassas, Virginia, with an average relative humidity of 72%.

Rainfall

In Manassas, during July, the rain falls for 15.8 days and regularly aggregates up to 2.68" (68mm) of precipitation. In Manassas, during the entire year, the rain falls for 157.5 days and collects up to 30.35" (771mm) of precipitation.

Snowfall

May through October are months without snowfall in Manassas.

Daylight

The average length of the day in July in Manassas is 14h and 34min.
On the first day of the month, sunrise is at 5:49 am and sunset at 8:38 pm. On the last day of July, in Manassas, sunrise is at 6:11 am and sunset at 8:21 pm EDT.

Sunshine

July has the most sunshine of the year in Manassas, Virginia, with an average of 10.7h of sunshine.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Manassas. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: In July, an average UV index of 6 transforms into the following instructions:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.