Monday, October 19, 2026 · Hour-by-hour forecast updated 2:15 AM CDT
59°F and clear at peak. Wind 3 mph from the SW, dew point 43°F.
Running in Rockford peaks twice a year — May (FitScore 84) and October (83) — with typical morning lows of 50°F and 46°F respectively. January is the limiting month, with average lows of 15°F and highs of only 30°F pulling its FitScore down to 44. Across the full year, Rockford ranks #160 of 200 U.S. running cities, with an annual FitScore of 70 (national median: 74). 9 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 Rockford are May, October, and September, with average FitScores of 84, 83, and 81 based on a decade of daily weather history. The most challenging is January (FitScore 44).
Historically, October in Rockford averages a FitScore of 83/100 — excellent running weather — with highs around 62°F, lows around 46°F, dew points near 43°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.