Knoxville/ Weather & Environment

Knoxville Bakes in 90-Degree Heat Before Late-Week Thunderstorms Roll In

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Published on September 08, 2026
Knoxville Bakes in 90-Degree Heat Before Late-Week Thunderstorms Roll InSource: Google Street View

Knoxville wakes to cloudy skies Tuesday, but the clouds will give way to a mostly sunny and hot afternoon with temperatures reaching about 90 degrees. Winds should stay light, and no rain is expected across the city.

Sunny, Hot And Quiet Through Wednesday

Tuesday night turns partly cloudy with a low near 67, followed by another sunny day Wednesday and a high near 90. The National Weather Service says dry conditions will hold through Wednesday, with no watches or warnings posted for the area.

Storm Chances Return Thursday

Thursday starts sunny and hot, with a high near 91, but a slight chance of showers arrives after 2 p.m. The rain risk increases Thursday night, when showers and thunderstorms could develop with a 50% chance of precipitation.

Friday stays warm near 90 degrees and brings another 50% chance of showers and thunderstorms, especially later in the day. The latest outlook is a substantive shift from Monday's storm chances and follows Hoodline's earlier forecast for the holiday.

Warm Weekend With On-And-Off Storm Risk

Saturday could reach 90 with a 50% chance of showers and thunderstorms, while Sunday may climb to 91 with a 40% rain chance. Monday remains mostly sunny and hot near 90, though a slight afternoon storm chance lingers, making Tuesday and Wednesday the clearest bets for outdoor plans.