Monday, October 19, 2026 · Hour-by-hour forecast updated 2:15 AM CDT
57°F and clear at peak. Wind 2 mph from the NW, dew point 43°F.
March and April are the best running months in Knoxville, scoring 87 and 87 on the FitScore scale with mornings near 41°F and afternoon highs around 61°F. July is the toughest month: sticky dew points averaging 68°F alongside highs of 88°F drag the average FitScore down to 57 — plan on pre-dawn starts. Across the full year, Knoxville ranks #81 of 200 U.S. running cities, with an annual FitScore of 76 (national median: 74). 9 months of the year score 70 or better.
Based on 2015–2024 daily weather history (Open-Meteo ERA5), scored against 200 U.S. cities. Monthly FitScore reflects each day’s best running window.
FitCast texts you tomorrow's hour-by-hour forecast every evening so you know exactly what to expect before your alarm goes off.
Based on today's FitScore analysis, the best time to run is All day with a peak FitScore of 100/100. Check the hourly breakdown above for detailed conditions throughout the day.
The best months for running in Knoxville are March, April, and October, with average FitScores of 87, 87, and 87 based on a decade of daily weather history. The most challenging is July (FitScore 57).
Historically, October in Knoxville averages a FitScore of 87/100 — excellent running weather — with highs around 72°F, lows around 52°F, dew points near 51°F, and 6 days of measurable rain. That's about even with the national median of 86 for October.
FitScore rates each hour from 0–100 for outdoor exercise based on temperature, humidity, dew point, wind, precipitation probability, UV index, and air quality. Higher scores mean better conditions.