Marine Corps Historic Half
Washington, DC, USA • May 17, 2026
Race Day Weather
60°
75° high
Breezy
Dry
Warm day, steady winds expected
Runners will face temperatures starting at 60°F and rising to 74°F. With an average humidity of 66% and a steady wind from the S at 10 mph, pacing adjustments may be necessary as the day warms. Staying hydrated and considering a conservative start will be key to managing the heat.
Race day forecast available in 51 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° |