Race-day weather · Wyndo for runners
Army Ten-Miler weather
October 11, 2026 · Arlington, VA · 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.
This edition has run
The 2026 Army Ten-Miler is behind us
The next edition typically follows the race's pattern — 2nd Sunday of October. We'll flip this page to the new date (and the live start-time read for race week) when the race confirms its schedule. The history below keeps the long view.
Race-morning weather history
2025 edition ran through a nor'easter (cold rain/wind) and still drew 28,000. Wyndo tracks what this calendar slot has actually served up at the start hour — temperature, dew point, wind, and rain — including the years when weather canceled or disrupted the race, and reads the live forecast for the start once race week arrives.
Median start temp
52°F
p75 (a warm year): 57°F
Median dew point
45°F
at the start hour
Rain at the start
5%
1 of 20 measured years
Warmest start
76°F
in 2017
Scroll sideways to see all columns.
| Year | Start temp | Dew point | Wind | Precip (start hr) | Day's high |
|---|---|---|---|---|---|
| 2025 | 63°F | 59°F | 13 mph | dry | 68°F |
| 2024 | 53°F | 52°F | 4 mph | dry | 81°F |
| 2023 | 50°F | 41°F | 8 mph | dry | 63°F |
| 2022 | 40°F | 37°F | 5 mph | dry | 65°F |
| 2021 | 68°F | 66°F | 7 mph | dry | 73°F |
| 2020 | 65°F | 63°F | 2 mph | dry | 72°F |
| 2019 | 53°F | 37°F | 6 mph | dry | 66°F |
| 2018 | 48°F | 44°F | 1 mph | dry | 59°F |
| 2017 | 76°F | 73°F | 8 mph | 1.4 mm | 82°F |
| 2016 | 57°F | 45°F | 14 mph | dry | 67°F |
| 2015 | 46°F | 42°F | 2 mph | dry | 71°F |
| 2014 | 49°F | 44°F | 6 mph | dry | 64°F |
| 2013 | 62°F | 58°F | 9 mph | dry | 66°F |
| 2012 | 51°F | 45°F | 9 mph | dry | 75°F |
| 2011 | 51°F | 48°F | 4 mph | dry | 80°F |
| 2010 | 52°F | 40°F | 4 mph | dry | 78°F |
| 2009 | 46°F | 40°F | 5 mph | dry | 68°F |
| 2008 | 52°F | 49°F | 3 mph | dry | 76°F |
| 2007 | 46°F | 40°F | 4 mph | dry | 71°F |
| 2006 | 54°F | 49°F | 6 mph | dry | 69°F |
Slot climatology: each row is the weather at this race's usual calendar slot and start hour (ERA5 reanalysis at the start line) — including years when the edition was canceled or moved. A computed slot date is not a claim the race ran that day.
Your heat-adjusted goal for the 10-miler
The same cited model as the full calculator, pointed at this race: the median start-hour conditions this calendar slot has served up — climatology, not a forecast.
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Race facts
- Start line
- Pentagon North Parking Lot
- Scheduled start
- 8:00 AM (America/New_York) — 2026 race-day schedule on the organizer site (checked 2026-08-17): waves 1-10 start 8:00-8:55 AM, wheelchair/wounded-warrior start 7:50 AM. No per-wave time table published; the 8:00 first-wave start is the anchor.
- Field size
- 2025 drew ~28,000 runners (nation's largest 10-miler); finisher count runs a few thousand lower
- Registration
- open
Wyndo is not affiliated with or endorsed by the Army Ten-Miler (officially the "42nd Annual Army Ten-Miler") 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.