Race-day weather · Wyndo for runners
Bronx 10 Mile weather
September 19, 2026 · Bronx, NY · scheduled start 8:00 AM (America/New_York). What the start usually feels like, year by year — and a live start-time read once the race is inside the 7-day forecast window.
Countdown
22 days to race day
The live race-day forecast unlocks 16 days from now, when September 19, 2026 enters the 7-day forecast window — a start-time read for the scheduled 8:00 AM start. Until then, live hourly data is not available; the history below shows what race morning usually looks like.
Race-morning weather history
Mid-September Bronx: mild-to-warm, humid possible, generally favorable — typical-climate, UNVERIFIED; ERA5 supplies actuals. No cancellations found in checked sources. Note the 2026 Sunday→Saturday move when reasoning about the slot; backfill only the two sourced dates given the floating pattern. Wyndo tracks what past editions of the race actually served up at the start hour — temperature, dew point, wind, and rain, and reads the live forecast for the start once race week arrives.
Scroll sideways to see all columns.
| Year | Start temp | Dew point | Wind | Precip (start hr) | Day's high |
|---|---|---|---|---|---|
| 2025 | 64°F | 61°F | 3 mph | dry | 77°F |
Each row is the weather at a real past edition's date and this race's current start hour (ERA5 reanalysis at the start line).
Your heat-adjusted goal for the 10-miler
The same cited model as the full calculator, pointed at this race: once this race's history is assembled, the typical start-hour conditions plug in here automatically.
Your race-day brief
Skip the taper-week refresh spiral. Email briefs for the Bronx 10 Mile: a start-hour outlook when race day enters the 7-day forecast window, updates only when it changes meaningfully, and a final look the day before.
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The first race-day outlook when your race enters the 7-day forecast window, an update when it changes meaningfully, and a final look the day before.
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Race facts
- Start line
- Start near Yankee Stadium on the Grand Concourse, just north of E 165th St (NYRR: "The race starts near Yankee Stadium on Grand Concourse, north of 165th Street"). Course runs north up the Concourse to Mosholu Pkwy and back south, finishing on Grand Concourse near 161st St. Coordinate is the Grand Concourse & E 165th St geocode — approximate to the block just north of it.
- Scheduled start
- 8:00 AM (America/New_York) — Mass start 08:00 AM (NYRR 2026 event page + JSON-LD 2026-09-19T12:00:00Z). Number pickup on race day 6:30–8:00 AM at Race-Day Central on River Ave (157th–153rd St). Wave/corral release by pace.
- Field size
- Approx FINISHERS, 2025 (~13,100), carried from the B3 scout brief — NOT re-verified to the integer this session. Local coverage of the Sep 14 2025 race cited "more than 14,900 runners participating" (likely starters/registrants, larger than timed finishers). Treat 13,100 as an estimate pending a results.nyrr.org/event/25BX10M pull; the true finisher count sits between ~13k and ~15k.
- Registration
- open (NYRR online registration; Five-Borough Series race that fills. NOT a lottery; also offers NYRR Race Free / complimentary-entry programs).
Wyndo is not affiliated with or endorsed by the Bronx 10 Mile (officially the "New Balance Bronx 10 Mile") or its organizers. Race names are used descriptively to identify the event; schedules and start times belong to the race — always confirm details on the official site. Weather guidance here is informational, never medical advice, and event alert flags on race day belong to the race's own medical team.