Monday, October 19, 2026 · Hour-by-hour forecast updated 3:12 AM EDT
54°F and overcast at peak. Wind 5 mph from the E, dew point 44°F.
Running in Boston peaks twice a year — May (FitScore 87) and October (86) — with typical morning lows of 50°F and 48°F respectively. January is the limiting month, with average lows of 23°F pulling its FitScore down to 53. Across the full year, Boston ranks #132 of 200 U.S. running cities, with an annual FitScore of 72 (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 10 AM–9 PM with a peak FitScore of 93/100. Check the hourly breakdown above for detailed conditions throughout the day.
The best months for running in Boston are May, October, and April, with average FitScores of 87, 86, and 81 based on a decade of daily weather history. The most challenging is January (FitScore 53). Charles River Esplanade catches a breeze — great for humid summer mornings.
Historically, October in Boston averages a FitScore of 86/100 — excellent running weather — with highs around 63°F, lows around 48°F, dew points near 47°F, and 7.8 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.