June weather forecast
Knoxville, TN

Knoxville embraces early summer with open arms in June. An upward trend from May, summer heat averages 86°F (30°C) high and signals beach season. The city's rainfall remains constant and manageable, ensuring summer plans remain intact. There’s ample sunshine and extended daylight hours for fun in the sun. June sets the stage for a scorching summer to follow.

Temperature

Knoxville's transition into June is noticed by a slight rise in the average high-temperature, advancing from a warm 78.4°F (25.8°C) in May to a tropical 86°F (30°C). Knoxville measures a considerable dip from daytime highs with an average low-temperature of 63°F (17.2°C) during June.

Heat index

For June, the heat index is appraised at a very hot 96.8°F (36°C). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
Note that heat index values are valued for light wind and location in the shade. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

In Knoxville, the average relative humidity in June is 72%.

Rainfall

In June, in Knoxville, the rain falls for 12.8 days. Throughout June, 2.44" (62mm) of precipitation is accumulated. In Knoxville, during the entire year, the rain falls for 148.9 days and collects up to 29.57" (751mm) of precipitation.

Snowfall

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

Daylight

June has the longest days of the year, with an average of 14h and 36min of daylight.
On the first day of June, sunrise is at 6:20 am and sunset at 8:47 pm. On the last day of the month, sunrise is at 6:22 am and sunset at 8:56 pm EDT.

Sunshine

June has the most sunshine of the year in Knoxville, with an average of 10.6h of sunshine.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum UV index of 6 during June translates into these guidelines:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. To cut down UV radiation exposure by about half, sport a wide-brim hat.