Monday, October 19, 2026 · Hour-by-hour forecast updated 3:14 AM EDT
60°F and clear at peak. Wind 1 mph from the W, dew point 44°F.
Running in Indianapolis peaks twice a year — October (FitScore 86) and April (84) — with typical morning lows of 49°F and 43°F respectively. January is the limiting month, with average lows of 23°F pulling its FitScore down to 55. Across the full year, Indianapolis ranks #116 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 Indianapolis are October, April, and May, with average FitScores of 86, 84, and 81 based on a decade of daily weather history. The most challenging is January (FitScore 55). Monon Trail is flat and exposed — carry water on anything over 5 miles in summer.
Historically, October in Indianapolis averages a FitScore of 86/100 — excellent running weather — with highs around 66°F, lows around 49°F, dew points near 46°F, and 6.9 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.