Knoxville

Knoxville Braces for Sunny Spells, Potential Thunderstorms, and Soaring Temperatures This Week

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Published on August 19, 2025
Knoxville Braces for Sunny Spells, Potential Thunderstorms, and Soaring Temperatures This WeekSource: Google Street View

The National Weather Service in Knoxville has issued a weather update with a detailed forecast for the coming days, highlighting a mix of sunny spells, the potential for thunderstorms, and gradual temperature changes in the region. Today's outlook promises a hot sun with temperatures soaring near 93 degrees and heat index values reaching a sweltering 101. Conditions are expected to remain calm throughout the evening as the temperature dips around 72 degrees.

Tomorrow in Knoxville, there’s a 40% chance of showers and thunderstorms after 2 p.m., with similar chances expected most days this week. The heat index may reach the upper 90s again, but by the weekend, highs should drop to the mid-80s, bringing some relief from the August heat.

The National Weather Service in Morristown, TN, said in a recent outlook that "a few storms are possible along the mountains of Tennessee and southwest North Carolina this afternoon and early evening. Localized flooding due to heavy rainfall is possible in southwest North Carolina." Still, the chance of widespread hazardous weather in the coming days is low.

Residents in the area are urged to watch for updates, especially near the mountains where weather can change quickly. The National Weather Service forecast notes, "Spotter activation is not needed at this time," meaning severe weather isn’t expected, but people should still stay alert and be ready for changing conditions.