East Tennessee Weather – June 29, 2025: Navigating Sunday’s Heat, a Wet Start to the Week and a Preview of the 4th of July

Good morning, East Tennessee!
As your local meteorologist, I’m delivering the latest weather update for Sunday, June 29, 2025. Today’s forecast brings a slightly warmer start compared to yesterday, with morning temperatures in the 60s and 70s and slightly higher dew points adding to the muggy feel.

Sunday: A Warm Start with Afternoon Storms
This morning feels a tad cozier than Saturday, with temperatures ranging from the 60s to 70s and dew points creeping up, hinting at increased humidity. Despite the warmer start, today mirrors recent patterns. Highs will climb to the low 90s, with the heat index settling in the mid to upper 90s—typical for late June in East Tennessee. Afternoon storms are expected to fire up, originating along the Smoky Mountains and Cumberland Plateau, with some potentially shifting into the Valley. If you’re out and about, check the radar periodically to stay ahead of these showers. The eastTNweather app is your perfect companion for real-time updates!

Monday and Tuesday: A Cold Front Brings Rain and High Humidity
Looking ahead, I’ll be tracking a trough from the Upper Midwest that will usher in a cold front on Monday, June 30, and Tuesday, July 1. This system will elevate dew points, creating a tropical-like atmosphere with more robust afternoon storms and better rain coverage. If your area has missed out on rain over the past week, Monday and Tuesday offer a solid chance to catch up, with areawide totals potentially ranging from 0.5″ to over 1.5″ of much-needed precipitation. Highs will hold in the upper 80s to near 90°F, and the heat index will persist in the mid to upper 90s, keeping conditions warm and sticky. Stay prepared for locally heavy rainfall and possible pooling on roads.

Post-Front Outlook: Drier Air and 4th of July Prep
Behind Tuesday’s cold front, the air will dry out slightly, trimming the heat index a bit—though it will still feel warm. As high pressure rebuilds, elevated rain chances will diminish, setting the stage for the 4th of July holiday weekend (July 3-6, 2025). This ridge will dominate through the weekend, bringing hot July weather with highs likely in the low to mid-90s and heat indices possibly climbing back toward the upper 90s. While this suggests a mostly dry holiday, keep an eye on forecasts as we approach for any late adjustments.

Heat and Storm Safety Tips for East Tennessee
With heat indices in the 90s and storm potential, here are key safety tips:

• Stay Hydrated: Sip water throughout the day, avoiding dehydrating drinks like alcohol or caffeine.
• Seek Cool Spots: Limit outdoor time from 10 AM to 4 PM and use air-conditioned or shaded areas.
• Dress Appropriately: Wear loose, light-colored clothing to reflect heat and protect your skin.
• Check on Others: Monitor elderly neighbors, children, and pets who are more prone to heat stress.
• Avoid Flooded Areas: Steer clear of standing water during storms, especially with the expected rain.