Monday, October 19, 2026 · Hour-by-hour forecast updated 3:13 AM EDT
59°F and mostly sunny at peak. Wind 7 mph from the NNE, dew point 41°F.
Running in New Haven peaks twice a year — May (FitScore 87) and October (86) — with typical morning lows of 51°F and 50°F respectively. January is the limiting month, with average lows of 25°F pulling its FitScore down to 57. Across the full year, New Haven ranks #122 of 200 U.S. running cities, with an annual FitScore of 73 (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 98/100. Check the hourly breakdown above for detailed conditions throughout the day.
The best months for running in New Haven are May, October, and April, with average FitScores of 87, 86, and 83 based on a decade of daily weather history. The most challenging is January (FitScore 57).
Historically, October in New Haven averages a FitScore of 86/100 — excellent running weather — with highs around 64°F, lows around 50°F, dew points near 48°F, and 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.