Monday, October 19, 2026 · Hour-by-hour forecast updated 2:13 AM CDT
58°F and clear at peak. Wind 4 mph from the S, dew point 47°F.
Running in St. Louis peaks twice a year — April (FitScore 86) and October (86) — with typical morning lows of 46°F and 51°F respectively. July is the toughest month: sticky dew points averaging 68°F alongside highs of 88°F drag the average FitScore down to 58 — plan on pre-dawn starts. Across the full year, St. Louis ranks #126 of 200 U.S. running cities, with an annual FitScore of 73 (national median: 74). 7 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 St. Louis are April, October, and March, with average FitScores of 86, 86, and 81 based on a decade of daily weather history. The most challenging is July (FitScore 58).
Historically, October in St. Louis averages a FitScore of 86/100 — excellent running weather — with highs around 69°F, lows around 51°F, dew points near 48°F, and 6.6 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.