Monday, October 19, 2026 · Hour-by-hour forecast updated 3:13 AM EDT
56°F and clear at peak. Wind 7 mph from the N, dew point 47°F.
January and February are the best running months in Jacksonville, scoring 86 and 84 on the FitScore scale with mornings near 48°F and afternoon highs around 64°F. August is the toughest month: oppressive dew points averaging 75°F alongside highs of 88°F drag the average FitScore down to 38 — plan on pre-dawn starts. Year-round, this is one of the tougher running climates in the country — #180 of 200 (annual FitScore 66 vs. the 74 national median), which makes timing the good windows matter more. 6 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 5 AM–8 AM with a peak FitScore of 96/100. Check the hourly breakdown above for detailed conditions throughout the day.
The best months for running in Jacksonville are January, February, and March, with average FitScores of 86, 84, and 82 based on a decade of daily weather history. The most challenging is August (FitScore 38).
Historically, October in Jacksonville averages a FitScore of 67/100 — good running weather — with highs around 79°F, lows around 66°F, dew points near 65°F, and 6.8 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.