Monday, October 19, 2026 · Hour-by-hour forecast updated 2:15 AM CDT
58°F and clear at peak. Wind 5 mph from the ENE, dew point 45°F.
January and December are the best running months in San Antonio, scoring 87 and 86 on the FitScore scale with mornings near 44°F and afternoon highs around 63°F. August is the toughest month: sticky dew points averaging 70°F alongside highs of 96°F drag the average FitScore down to 46 — plan on pre-dawn starts. Across the full year, San Antonio ranks #161 of 200 U.S. running cities, with an annual FitScore of 70 (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 San Antonio are January, December, and February, with average FitScores of 87, 86, and 85 based on a decade of daily weather history. The most challenging is August (FitScore 46).
Historically, October in San Antonio averages a FitScore of 75/100 — good running weather — with highs around 83°F, lows around 64°F, dew points near 58°F, and 6.3 days of measurable rain. That's below 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.