Good morning, East Tennessee! As your local meteorologist, I’m bringing you the latest weather scoop for Tuesday, July 15, 2025. Today we’re starting off with extremely mild and muggy conditions—morning temps are in the 70s, with dew points matching that cozy summer feel. In my personal opinion, it’s a perfect East Tennessee summer morning! This easy-to-follow blog breaks it down day by day for Knoxville, Chattanooga, and the Great Smoky Mountains, so let’s dive in and plan your day!
Tuesday: Mild Start, Hot Afternoon with Storms Possible
We’re kicking off with that mild, muggy vibe, and we’ll warm up quick to near 90°F by lunchtime, with afternoon highs hitting the mid-90s—maybe a degree or two warmer than yesterday. That humidity will push the heat index into the low 100s, so it’s going to feel steamy! Practice heat safety—stay hydrated, seek shade, and slap on sunscreen because our UV Index is climbing to 11. That means you could get a sunburn in just 15 minutes without protection! Our average high for this time of year is the hottest it gets at 89°F, sticking through July 22nd, then easing to 88°F through most of August. On the rain front, a little wave will move from Knoxville to the Tri-Cities this afternoon, sparking a few storms. Northeast East Tennessee is the main spot for rain, so if you’re south or west of Knoxville, your storm chances are lower. Track it with the eastTNweather app!
Hot and Humid with Afternoon Storms
Wednesday, July 16, keeps the heat coming with highs in the low 90s and a heat index near 100°F. We’ll see those summertime afternoon and evening storms roll in, bringing locally heavy rain that could lead to localized or flash flooding concerns. We’re under a Level 1 risk for floods in Northeast East Tennessee today, and that could carry through the week. Not a total washout, but we sure need the rain—keep that in mind!
Warm Weather with Storm Chances Sticking Around
Thursday, July 17, follows suit with highs in the low 90s and a heat index around 100°F. Afternoon and evening storms are back, with that same potential for heavy rain and flooding, especially in the northeast. Lightning might pop up, so use the eastTNweather app’s Interactive Radar to navigate around them.
Muggy Heat with More Storms & Locally Heavy Rain
Friday, July 18, brings another hot day with lows in the low 90s and a heat index near 100°F. Those afternoon and evening storms will stick around, possibly dumping heavy rain that could cause localized flooding. It’s not a soaker every day, but the rain’s welcome—track it with the app!
The Heat Sticks With Us This Weekend, Storms Possible
Saturday, July 19, keeps the pattern with highs in the low 90s and a heat index around 100°F. Expect afternoon and evening storms, with a chance for heavy rain and flooding risks. Use the app to stay ahead of the weather and enjoy your weekend safely.
A Hot Finish to the Weekend with More Storm Chances
Sunday, July 20, wraps the week with highs in the low 90s and a heat index near 100°F. Afternoon and evening storms will linger, bringing that same heavy rain and flooding possibility. It’s a hot, muggy end, but the rain’s a blessing—check the app for updates!
ABOVE AND BEYOND THE 7 DAY FORECAST
Looking past the 7 Day Forecast, the Climate Prediction Center has issues a forecast based on probabilities.
These maps don’t show you how far above or below, but rather an idea of how strong the signal is.
Why This Weather’s Happening
This hot July weather is sticking around, driven by a strong mid-level ridge along the Gulf coast, putting us on the northern side where disturbances flow in. That’s what’s sparking those afternoon storms, some days heavier than others. With rain piling up, localized flooding’s a concern, especially in Northeast East Tennessee. For Knoxville locals, Chattanooga outdoor fans, and Smoky Mountain visitors, this helps you plan and stay safe.
Your Weather Friend: The eastTNweather App
The eastTNweather app is your go-to for East Tennessee weather. Launched in October 2023 after 20 years at WBIR, it delivers three daily video forecasts, a live morning chat, and updates on MikeWitcherTV and ETNWeather. Free on Roku, Amazon Fire, eastTNweather.com, and the app, its Interactive Radar gives you past, current, and future radar for two hours—perfect for dodging storms. Download it today!
Stay Connected with eastTNweather
I’m here to keep you in the know and safe. Pop over to eastTNweather.com, grab the app, or follow me on social media for the latest on today’s heat and the week’s storms. Have a great Tuesday, enjoy that perfect summer morning, and check back in—let’s tackle this weather together!