Monday, October 19, 2026 · Hour-by-hour forecast updated 2:14 AM CDT
61°F and clear at peak. Wind 6 mph from the SSE, dew point 43°F.
Running in Arlington peaks twice a year — November (FitScore 86) and March (84) — with typical morning lows of 49°F and 51°F respectively. July is the toughest month: sticky dew points averaging 69°F alongside highs of 96°F drag the average FitScore down to 49 — plan on pre-dawn starts. Across the full year, Arlington ranks #131 of 200 U.S. running cities, with an annual FitScore of 72 (national median: 74). 7 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 Arlington are November, March, and December, with average FitScores of 86, 84, and 84 based on a decade of daily weather history. The most challenging is July (FitScore 49).
Historically, October in Arlington averages a FitScore of 81/100 — excellent running weather — with highs around 79°F, lows around 61°F, dew points near 53°F, and 6.6 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.