Knoxville

Patchy Fog This Morning And Heat Late Week In Knoxville

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Published on June 25, 2026
Patchy Fog This Morning And Heat Late Week In KnoxvilleSource: Facebook/US National Weather Service Morristown Tennessee

Knoxville started Thursday, June 25, on the cool and quiet side, with patchy fog and temperatures sitting in the low-to-mid 60s across many valley neighborhoods. The fog is expected to thin out by mid-morning, giving way to mostly sunny skies and a high near 88°F. West to southwest winds will stay light, so after the morning commute the afternoon should feel warm but generally calm.

Patchy Fog This Morning

Patchy fog will be most noticeable near rivers and on low-lying roads through about 9 to 10 a.m., where visibility could drop in spots. Drivers should give themselves a little extra time on bridge crossings and along the Tennessee River until the fog lifts. By late morning, most of the area should see skies turning mostly sunny.

Showers And Storms Return Friday Through The Weekend

Showers and isolated thunderstorms are set to make a comeback on Friday, June 26, with a slight chance after about 4 p.m. and roughly a 20% chance of measurable rain for the day. Saturday, June 27, brings the higher rain odds, with showers and thunderstorms likely, southwest winds at 5 to 10 mph, and gusts that could reach up to 20 mph. Sunday, June 28, looks unsettled as well, with showers and storms likely in the morning and early afternoon before conditions start to dry out. The National Weather Service Morristown notes that timing and coverage of the rain and storms may shift as the pattern develops.

Hot Start To Next Week

An upper ridge builds in early next week and cranks up the heat, pushing high temperatures into the 90s. Expect highs near 93°F on Monday, about 95°F on Tuesday, and around 96°F on Wednesday, July 1. Afternoon heat index values could reach or even top 100°F at times through midweek, which will make outdoor work and prolonged activity uncomfortable. Whenever possible, plan the most strenuous outdoor tasks for the morning or evening hours.

Plan Ahead

For the weekend and early next week, bring water, wear light clothing, and keep plans flexible for any outdoor events. Storms can roll through with brief heavy rain and gusty winds and may not offer much advance warning. Keep your phone charged so you can receive local alerts, and check the forecast before heading out each day. If you have concerns about heat or storm impacts on specific activities, reach out to local officials or emergency services for guidance.