Weather
Climate Avg| Time | Temp | Dew Pt | Humidity | Wind | Conditions |
|---|---|---|---|---|---|
| Start | 38.4 – 46°F | 30° Crisp | 49 – 83% | 7 mph S | Clear sky |
| 8:00 AM | 39.1 – 47°F | 31° Crisp | 51 – 82% | 7 mph S | Clear sky |
| Finish | 42.5 – 51.8°F | 35° Crisp | 50 – 77% | 7 mph S | Partly cloudy |
Based on 3-year average for this date. Real forecast available in 141 days.
Elevation Profile
Course Stats
Mile Splits
| Mile | Grade |
|---|---|
| 1 | -0.4% |
| 2 | -0.4% |
| 3 | -0.1% |
| 4 | +0.1% |
| 5 | -0.3% |
| 6 | +0.4% |
| 7 | +1.0% |
| 8 | -0.6% |
| 9 | -0.4% |
| 10 | -0.1% |
| 11 | +0.1% |
| 12 | -0.1% |
| 13 | -0.1% |
| 14 | +0.6% |
RM Difficulty Index
Race-Day Weather History
Race-morning conditions on this date over the past 10 years: median 38°F with a 32°F dew point and 7 mph wind. 1 of 10 years were warm enough to slow race pace.
| Year | Temp | Dew Pt | Wind | Rain | Sky |
|---|---|---|---|---|---|
| 2025 | 50°F | 37°F | 7 mph | — | Partly cloudy |
| 2024 | 45°F | 27°F | 10 mph | — | Partly cloudy |
| 2023 | 31°F | 19°F | 4 mph | — | Clear |
| 2022 | 51°F | 37°F | 10 mph | — | Partly cloudy |
| 2021 | 33°F | 18°F | 5 mph | — | Clear |
| 2020 | 66°F | 61°F | 11 mph | — | Partly cloudy |
| 2019 | 37°F | 31°F | 2 mph | — | Partly cloudy |
| 2018 | 35°F | 33°F | 13 mph | 0.3" | Rain |
| 2017 | 37°F | 31°F | 7 mph | — | Clear |
| 2016 | 39°F | 33°F | 6 mph | — | Partly cloudy |
Morning conditions (race window) on the DC Rock 'n' Roll Half calendar date each year, from the ERA5 reanalysis archive — the race’s usual slot, not necessarily each edition’s exact day.
DC Rock 'n' Roll Half Pace Calculator & Race Plan
The DC Half runs past the monuments and along the National Mall. 179 meters of gain with some short hills that are steeper than expected. March weather in DC is variable.
Our splits handle the rolling terrain and whatever the weather throws at you.
DC Rock 'n' Roll Half FAQ
When is the next DC Rock 'n' Roll Half?›
The next DC Rock 'n' Roll Half is on Saturday, March 20, 2027.
How long is the DC Rock 'n' Roll Half?›
The DC Rock 'n' Roll Half is 13.1 miles (21.097 km), the standard half marathon distance. It runs in Washington, DC.
How much elevation gain does the DC Rock 'n' Roll Half have?›
The DC Rock 'n' Roll Half has about 588 ft (179 m) of climbing and 638 ft of descent, with a maximum grade of 13.1%.
Is the DC Rock 'n' Roll Half flat, downhill, or hilly?›
The DC Rock 'n' Roll Half is a net downhill course, dropping 49 ft (15 m) from start to finish, with 588 ft of climbing along the way.
How hard is the DC Rock 'n' Roll Half?›
Runner's Math scores the DC Rock 'n' Roll Half 37/100 (Moderate) — #7 of 16 half marathons in our library, ranked by modeled time cost. The profile costs about 0:29 versus a flat course for a runner at 4:00-marathon pace.
What's the weather usually like at the DC Rock 'n' Roll Half?›
Over the past 10 years on this date, median race-morning conditions were 38°F with a 32°F dew point and 7 mph wind. 1 of 10 years were warm enough to slow race pace.