Monday, October 19, 2026 · Hour-by-hour forecast updated 12:13 AM PDT
63°F and clear at peak. Wind 5 mph from the NE, dew point 40°F.
Running in Ontario peaks twice a year — November (FitScore 97) and April (96) — with typical morning lows of 51°F and 52°F respectively. There is no truly bad month here — even August, the weakest, averages a FitScore of 81. Across the full year, Ontario ranks #21 of 200 U.S. running cities, with an annual FitScore of 91 (national median: 74). Conditions stay runnable nearly year-round, with 12 months scoring 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 5 AM–10 AM with a peak FitScore of 99/100. Check the hourly breakdown above for detailed conditions throughout the day.
The best months for running in Ontario are November, April, and January, with average FitScores of 97, 96, and 95 based on a decade of daily weather history. The most challenging is August (FitScore 81).
Historically, October in Ontario averages a FitScore of 93/100 — excellent running weather — with highs around 83°F, lows around 59°F, dew points near 45°F, and 1.4 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.