15-Day Weather Forecast - Knoxville
15-day weather forecast for Knoxville: temperatures from 15°C (59°F) to 35°C (95°F). Average daily high 31°C (88°F) over the next 15 days.
Hourly Forecast by Day
15-Day Temperature Trend
15-Day Weather Forecast
Updated just nowWeather Insight
Knoxville's 15-day outlook ranges from a low of 15°C to a high of 35°C, with an average daytime high near 31°C. That's 2° above the long-term average high of 29°C for this time of year. Air quality is currently Moderate (AQI 73), driven mainly by PM2.5 at 17 μg/m³.
Today vs Normal
The long-term average high for today is 29°C.
14 of the last 28 days with published data ran above normal.
That's a break from the pattern - today's forecast runs above normal even though the recent stretch mostly ran below.
Red = above normal, blue = at or below · last 12 days
Air Quality
Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.
Extended Outlook for Knoxville
Over the next 15 days, Knoxville is forecast to see temperatures ranging from 14°C to 35°C, averaging a daily high of 31°C. The extended outlook indicates significant rainfall totalling 38.4 mm spread across 6 days. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.