Monday, October 19, 2026 · Hour-by-hour forecast updated 3:14 AM EDT
58°F and clear at peak. Wind 6 mph from the WSW, dew point 50°F.
Running in Grand Rapids peaks twice a year — May (FitScore 86) and September (83) — with typical morning lows of 49°F and 58°F respectively. January is the limiting month, with average lows of 20°F pulling its FitScore down to 46. Across the full year, Grand Rapids ranks #147 of 200 U.S. running cities, with an annual FitScore of 71 (national median: 74). 8 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 Grand Rapids are May, September, and October, with average FitScores of 86, 83, and 82 based on a decade of daily weather history. The most challenging is January (FitScore 46).
Historically, October in Grand Rapids averages a FitScore of 82/100 — excellent running weather — with highs around 61°F, lows around 46°F, dew points near 44°F, and 9.8 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.