Knoxville

Knoxville Grapples with High Humidity and Thunderstorm Chances, NWS Advises

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Published on August 01, 2025
Knoxville Grapples with High Humidity and Thunderstorm Chances, NWS AdvisesSource: David Ratledge, CC BY 4.0, via Wikimedia Commons

The National Weather Service in Knoxville reports that early morning fog and mist have set the stage for a humid day, with humidity levels hitting 100% and temperatures currently at 73°F. Visibility is reduced to 5 miles due to the current weather conditions. The NWS forecast suggests that today brings a 40 percent chance of showers and thunderstorms, primarily after 1 pm, with a high near 87 degrees.

Tonight, the chances of precipitation drop to a 20 percent chance of showers and thunderstorms before 9 pm, under mostly cloudy skies and an expected low around 70. After the calm wind of the morning, a light northeast breeze of around 5 mph is on the table. According to a detailed forecast provided by the NWS, calm conditions will give way to winds from the north in the afternoon.

For those making weekend plans, the outlook for Saturday indicates a strong likelihood of showers and thunderstorms—about a 70% chance—mainly post 2 pm, with new rainfall amounts between a tenth and quarter of an inch possible, outside the higher amounts that thunderstorms may bring. Similar conditions persist into Saturday night, with a high near 83 during the day, dipping to around 68 later, all accompanied by the steadfast northeast wind around 5 mph.

On Sunday, the pattern of storms continues with showers and potential thunderstorms, particularly between 2 pm and 5 pm, and again after 5 pm. The probability of precipitation remains steady at 60%, ensuring most of the day will remain mostly cloudy with a high of 79 and gentle east winds. The moisture is predicted, with a high probability that it will bring showers and thunderstorms before 11 pm, under mostly cloudy skies and a low around 65, becoming calm as the night progresses.

Looking ahead to the new workweek, Monday holds a slight chance of showers in the morning, with an increased possibility of thunderstorms after 2 pm. With calmer conditions just before 8 am, the weather offers some respite before the potential afternoon turbulence. While skies will be partly sunny, the high is expected to be around 84, and the chances of precipitation hold at 30%. As the week unfolds, residents can expect more showers and possible thunderstorms, leaving the forecast consistently unpredictable.