Marine Corps Historic Half
Washington, DC, USA • May 17, 2026
Race Day Weather
60°
75° high
Breezy
Dry
Warm afternoon, moderate humidity
Runners will face temperatures starting at 60°F and peaking at 74°F, with an average humidity of 66%. A gentle south wind at 10 mph will provide some relief. Runners should consider adjusting their pace and staying hydrated, particularly as temperatures rise in the later stages of the race.
Race day forecast available in 46 days
Pre-raceRace windowPost-race
Historical Weather
Based on 18 years of data
Avg Temp
71°F
L:61° H:71°
RunScore
Conditions
Rain Freq
28%
5 of 18 yrs
Wind10mph
Dew54°F
Temperature History
Range of temperatures during race hours for each year.
Detailed History
| Year | Conditions | Low / High | Rain | Dew Point | Score |
|---|---|---|---|---|---|
2025 |  | 69°/73° | - | 48° | |
2024 | | 64°/71° | - | 60° | |
2023 | | 57°/74° | - | 49° | |
2022 | | 74°/82° | - | 66° | |
2021 | | 53°/72° | - | 45° | |
2020 | | 62°/66° | - | 55° | |
2019 | | 60°/71° | - | 56° | |
2018 | | 69°/85° | - | 68° | |
2017 | | 59°/66° | - | 46° | |
2016 | | 49°/59° | Light | 31° | |
2015 | | 71°/81° | - | 69° | |
2014 | | 53°/66° | - | 40° | |
2013 | | 62°/69° | Light | 62° | |
2012 | | 60°/78° | - | 47° | |
2011 |  | 63°/70° | Light | 63° | |
2010 | | 63°/70° | - | 49° | |
2009 | | 59°/62° | Light | 50° | |
2008 | | 59°/66° | Light | 52° |