Monday, October 19, 2026 · Hour-by-hour forecast updated 12:15 AM PDT
56°F and overcast at peak. Wind 3 mph from the ESE, dew point 50°F.
Running in Portland peaks twice a year — July (FitScore 93) and May (92) — with typical morning lows of 58°F and 48°F respectively. December averages 16.5 days of measurable rain — the wettest stretch of the year — holding its FitScore to 66. Across the full year, Portland ranks #64 of 200 U.S. running cities, with an annual FitScore of 83 (national median: 74). Conditions stay runnable nearly year-round, with 10 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 All day with a peak FitScore of 99/100. Check the hourly breakdown above for detailed conditions throughout the day.
The best months for running in Portland are July, May, and June, with average FitScores of 93, 92, and 91 based on a decade of daily weather history. The most challenging is December (FitScore 66). Forest Park trails stay cool even on warm days. Rain is light drizzle — most locals run through it.
Historically, October in Portland averages a FitScore of 89/100 — excellent running weather — with highs around 63°F, lows around 47°F, dew points near 47°F, and 10 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.