July weather forecast
Knoxville, TN

The potency of Knoxville’s summer peaks in July. With the month’s average high temperatures topping at 88.9°F (31.6°C), it distinguishes itself as the hottest month of the year. A consistent UV index of 6 is expected, as is typical of this season, necessitating sun protection always. Despite the long hours of daylight, refreshing splash pads and river activities keep the heat enjoyable and fun-filled. Knoxville's July climate paints the quintessential picture of a vibrant, sun-drenched summer.

Temperature

July proves to be the warmest month in Knoxville, Tennessee, recording an average peak temperature of 88.9°F (31.6°C) and a minimum temperature of 66.7°F (19.3°C).

Heat index

Throughout July, the heat index is appraised at a blisteringly hot 104°F (40°C). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.
In the scope of the heat index, its values resonate with shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

In Knoxville, the average relative humidity in July is 71%.

Rainfall

In Knoxville, in July, during 16.2 rainfall days, 2.76" (70mm) of precipitation is typically accumulated. Throughout the year, there are 148.9 rainfall days, and 29.57" (751mm) of precipitation is accumulated.

Snowfall

In Knoxville, Tennessee, snow does not fall in May through October.

Daylight

The average length of the day in July is 14h and 19min.
On the first day of the month, sunrise is at 6:23 am and sunset at 8:56 pm. On the last day of July, sunrise is at 6:42 am and sunset at 8:41 pm EDT.

Sunshine

In July, the average sunshine in Knoxville is 10.4h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: In July, the maximum UV index of 6 translates into these guidelines:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. 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. A hat with a broad brim is indispensable, filtering out up to half of UV rays.