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

June's arrival coincides with a subtle temperature rise, moving from May's moderately hot 78.4°F (25.8°C) to a tropical 86°F (30°C). In Knoxville, a significant divergence from daytime highs is recorded, with average lows of 63°F (17.2°C) during June nights.

Heat index

June's average heat index is computed to be a very hot 96.8°F (36°C). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.
Know that the heat index computations account for shaded terrains and slight winds. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. 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 quite important for children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it 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. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

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

Rainfall

In June, 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

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

Sunshine

With an average of 10.6h of sunshine, June has the most sunshine of the year.

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 threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In June, the average maximum UV index of 6 translates into the following recommendations:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.