Monday, October 19, 2026 · Hour-by-hour forecast updated 2:11 AM CDT
61°F and overcast at peak. Wind 7 mph from the ESE, dew point 42°F.
Running in Sioux Falls peaks twice a year — May (FitScore 86) and October (83) — with typical morning lows of 49°F and 42°F respectively. January is the limiting month, with average lows of 11°F and highs of only 27°F pulling its FitScore down to 40. Across the full year, Sioux Falls ranks #175 of 200 U.S. running cities, with an annual FitScore of 68 (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 Sioux Falls are May, October, and September, with average FitScores of 86, 83, and 82 based on a decade of daily weather history. The most challenging is January (FitScore 40).
Historically, October in Sioux Falls averages a FitScore of 83/100 — excellent running weather — with highs around 59°F, lows around 42°F, dew points near 37°F, and 4.5 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.