Monday, October 19, 2026 · Hour-by-hour forecast updated 1:13 AM MDT
70°F and overcast at peak. Wind 7 mph from the ESE, dew point 17°F.
Running in Boise peaks twice a year — September (FitScore 98) and July (97) — with typical morning lows of 55°F and 65°F respectively. December is the limiting month, with average lows of 25°F pulling its FitScore down to 58. Across the full year, Boise ranks #58 of 200 U.S. running cities, with an annual FitScore of 84 (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 Boise are September, July, and August, with average FitScores of 98, 97, and 97 based on a decade of daily weather history. The most challenging is December (FitScore 58).
Historically, October in Boise averages a FitScore of 92/100 — excellent running weather — with highs around 65°F, lows around 43°F, dew points near 34°F, and 2.8 days of measurable rain. That's above 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.