Tuesday, October 20, 2026 · Hour-by-hour forecast updated 7:59 AM CDT
61°F and overcast at peak. Wind 7 mph from the NE, dew point 47°F.
Running in Chattanooga peaks twice a year — November (FitScore 88) and March (87) — with typical morning lows of 43°F and 43°F respectively. July is the toughest month: sticky dew points averaging 70°F alongside highs of 88°F drag the average FitScore down to 53 — plan on pre-dawn starts. Across the full year, Chattanooga ranks #79 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 Chattanooga are November, March, and April, with average FitScores of 88, 87, and 87 based on a decade of daily weather history. The most challenging is July (FitScore 53).
Historically, October in Chattanooga averages a FitScore of 86/100 — excellent running weather — with highs around 73°F, lows around 54°F, dew points near 53°F, and 5.5 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.