Knoxville is starting Tuesday, June 9, 2026, in full swamp mode. Fog and mist are draped over the city with temperatures near 70°F and the air feeling completely saturated. That soggy setup is expected to fuel rounds of showers and thunderstorms through the day, so the commute may come with wet roads and pockets of heavy rain.
Morning Fog, Then Storms
Forecasters call for a chance of rain showers between 8 a.m. and 11 a.m., then showers and thunderstorms are likely through the afternoon and into the evening, with a high near 85°F. Southwest winds stay on the light side at 0–10 mph. Many spots could see a tenth to a quarter inch of rain, although any stronger storm could quickly bump those totals higher. This timing and rainfall outlook comes from the National Weather Service.
Where The Biggest Rain Could Fall
With very moist air in place and weather boundaries moving slowly, storms may repeatedly pop over the same neighborhoods. That could lead to brief training storms and localized ponding on roads, especially in low-lying or poorly drained spots. We have already been dealing with similar starts recently, with foggy, muggy starts setting the stage earlier this week.
Heat Builds Through The Week
After today, the heat dials up. Temperatures climb into the upper 80s and near 90°F by Thursday and Friday, with heat index values pushing into the mid-90s on Wednesday and Thursday. A cold front sliding in sometime between Friday and Saturday should bring a short-lived break in the humidity. Daily storm chances, however, are expected to stick around even as the heat builds, according to the National Weather Service.
Plan For The Commute
Fog will cut visibility this morning, so leave extra room on the roads and extra time on the clock. Avoid driving through standing water, since even shallow water can hide hazards or knock out traction in a hurry. Keep an eye out for sudden heavy downpours that can reduce visibility and turn roads slick in minutes.
If you have outdoor plans, build in a backup indoor or sheltered option, and keep a charged phone handy so you can monitor radar and local updates.
We will update this post if any watches or warnings are issued. Keep an ear on local emergency channels and trusted forecasts for changes through the day.
