Forecast for each day of Army Ten-Miler 2026
- SunOct 11
Not in the forecast yet. The National Weather Service forecasts about 7 days ahead, so this day comes into range around Oct 4.
Each day covers only the event’s hours, in local time. Levels use the same weather-risk scale as the Road Travel app. For delays or closures, follow the event’s own announcements.
What October is usually like
Monthly normals from NOAA’s Washington Reagan Airport station, the nearest long-term station to Pentagon North Lot (2 miles away).
| Month | Arlington Washington Reagan Airport station · 2 mi from Pentagon North Lot | |
|---|---|---|
| High / low °F | Precip (in) | |
| Jan | 45° / 30° | 2.9 |
| Feb | 48° / 32° | 2.6 |
| Mar | 57° / 39° | 3.5 |
| Apr | 68° / 48° | 3.2 |
| May | 77° / 58° | 3.9 |
| Jun | 85° / 68° | 4.2 |
| Jul | 90° / 72° | 4.3 |
| Aug | 88° / 71° | 3.2 |
| Sep | 81° / 64° | 3.9 |
| Oct | 69° / 52° | 3.7 |
| Nov | 58° / 42° | 2.9 |
| Dec | 49° / 35° | 3.4 |
NOAA NCEI U.S. Climate Normals, 1991–2020: WASHINGTON REAGAN AP (USW00013743, 10 ft). Precipitation is the monthly total of rain and melted snow, in inches. “—” means the station does not publish that normal.
Official updates
Delays, closures and safety instructions come from the organizers, so these go straight to their pages and to the National Weather Service.
- Army Ten-Miler · officialArmy Ten-Miler race-day schedule
- Army Ten-Miler · officialArmy Ten-Miler FAQs (rain or shine)
- Army Ten-Miler · officialArmy Ten-Miler official site
- National Weather ServiceForecast for Pentagon North Lot
Check the official National Weather Service forecast for Pentagon North Lot and the organizers’ announcements before you go.
Driving to Army Ten-Miler? See the weather for the hour you’ll be on the road
Road Travel times the forecast to your drive into Arlington, so you see conditions where you will be when you get there, and alerts about storms ahead on the way.
Questions about Army Ten-Miler weather
When is Army Ten-Miler 2026?
October 11, 2026, at Pentagon North Lot in Arlington. Race: 8–11:25 AM, per the organizers.
How much does it rain in Arlington in October?
Arlington averages 3.7 inches of rain in October at NOAA’s Washington Reagan Airport station (1991–2020 normals). The forecast above shows this year’s chances for each day of the event.
How warm is it in Arlington in October?
October averages a high of 69°F and a low of 52°F at NOAA’s Washington Reagan Airport station (1991–2020 normals).