Knoxville woke up on Sunday, May 3, 2026, to a cold but crystal-clear start, with temperatures hovering around 41°F and barely a whisper of wind. Low-lying neighborhoods and higher-elevation valleys could spot some light frost before sunrise, and a few mountain pockets are under a freeze warning through mid-morning. The tradeoff for shivering through the early hours: plenty of sunshine later and a mild afternoon high near 68°F, so most outdoor plans are safe once the frost window closes.
This Morning: Frost And Freeze Advisories
The National Weather Service in Morristown has a Frost Advisory in place through 9 AM EDT for a wide swath of East Tennessee, along with a Freeze Warning for some mountain counties, including Johnson and southeast Carter. The main casualties here are likely to be exposed plants and frosty car windows. Temperatures in hollows and higher terrain may briefly dip to near or below freezing, so gardeners are urged to cover tender vegetation. For the full rundown of affected counties and advisory details, check NWS Morristown.
Afternoon And Early Week: Sunshine, Then A Quick Warm-Up
By this afternoon, the story shifts to blue skies and a high around 68°F, with light northwest breezes of 0–5 mph making it feel comfortably cool instead of cold. From there, temperatures stage a quick rebound: Monday, May 4, is expected to climb into the upper 70s, with Tuesday, May 5, pushing near 80°F as southwest winds pick up and turn breezy and occasionally gusty. That rapid warm-up was already flagged in our surprise May frost outlook.
Midweek: Showers And Gusty Storms On Deck
Late Tuesday night into Wednesday, May 6, the pattern flips again as rain chances ramp up. Showers and thunderstorms are likely, with a higher risk for heavy downpours and locally gusty winds during the day on Wednesday. Forecast probabilities for midweek rain climb into the 60–80% range, and some storms could drop brief heavy rainfall or produce wind gusts strong enough to snap limbs or trigger localized flooding. Anyone with outdoor plans midweek should keep tabs on fresh updates and any potential watches from the NWS Morristown.
How To Get Ready
This morning, cover or bring in sensitive plants and hold off on watering until the frost threat is past. Before the warmer, breezier southwest winds arrive Monday, make sure patio furniture and other lightweight items are secured. Plan for slower travel and reduced visibility during any heavier midweek downpours, and keep an eye on updated forecasts and local advisories in case conditions change.
