Knoxville

Knoxville's Varied Weather Forecast: Slight Rain Chances Today with Increasing Odds for Weekend Showers

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Published on August 21, 2025
Knoxville's Varied Weather Forecast: Slight Rain Chances Today with Increasing Odds for Weekend ShowersSource: David Ratledge, CC BY 4.0, via Wikimedia Commons

The National Weather Service in Knoxville has issued a forecast for varying weather conditions in the coming days. Today, there's a slight chance of showers and thunderstorms, with the weather partially sunny and expectations for highs to hover around 87 degrees Fahrenheit. Winds are anticipated to be light, shifting northward at around 5 mph by the afternoon. As per the Knoxville NWS, there’s a slim 20 percent chance of precipitation today.

Looking ahead to tonight, there remains a marginal chance of rain and thunderstorms between 7 and 8 PM, after which the skies are expected to partially clear up, leading to lows of about 69 degrees. The wind will continue to be tame, staying north at about 5 mph before becoming calm by nightfall. However, the chance of precipitation will drop to a mere 10 percent.

Friday's outlook suggests a better possibility of rain, with a 40 percent chance of showers and thunderstorms likely to begin after 2 PM. The day will start mostly sunny with high temperatures that could reach 89 degrees and heat index values potentially escalating to as high as 95. The wind is forecasted to remain calm throughout the day. This information was obtained from the official forecast provided by the National Weather Service, Morristown, TN.

The outlook for Friday night through Wednesday indicates fluctuating chances of rainfall and thunderstorms. Friday night has a 30 percent chance of precipitation before clear skies emerge. The weekend presages a higher likelihood for showers and thunderstorms, particularly on Saturday, with a 60 percent probability. Clear skies are on the horizon by Sunday night, giving way to a sunny Monday with a high near 82 degrees. The rest of the week looks mostly sunny with mild temperatures, evidence of the region’s typical late summer weather pattern.