Visitation · National Historical Park

Chesapeake & Ohio Canal National Historical Park visitation by month and year

September is the busiest month at Chesapeake & Ohio Canal, when the average temperature nearby is 67 degrees. February is the quietest, and the average temperature then is 35 degrees. The gap between them is narrow, 449,071 against 241,902. The warmest month is July, a little off the peak. Annual visits fell 10.5 percent, from 5,116,787 in 2019 to 4,579,704 in 2025.

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Visits by month, with temperature and precipitation

Bars are the average recreation visits in each month over 2021 to 2025. The line is the average temperature at Vienna, 8 miles from the park's reference point at 418 feet, station USC00448737 in the NOAA 1991 to 2020 climate normals. The lower panel is monthly rain and snow from the same station, also 1991 to 2020 averages.

Annual visits, 1979 to 2025

Recreation visits per calendar year. A year with a missing month is left blank rather than estimated.

The last ten years

Year	Recreation visits	Change on prior year
2025	4,579,704	+3.6%
2024	4,421,276	-1.1%
2023	4,470,592	+4.3%
2022	4,286,185	-14.4%
2021	5,005,217	+2.4%
2020	4,888,436	-4.5%
2019	5,116,787	+15.3%
2018	4,438,818	-8.7%
2017	4,859,573	+1.0%
2016	4,813,078	+0.3%

Visitation at other parks

Lincoln Memorial George Washington Memorial Parkway San Francisco Maritime National Historical Park Boston National Historical Park

Source: NPS Visitor Use Statistics, monthly recreation visits, as compiled for Publicopia Labs. A year is shown only when all twelve months were reported. Temperature, precipitation and snowfall normals are the 1991 to 2020 monthly averages published by NOAA NCEI for station USC00448737, 418 feet above sea level. Data refreshed October 14, 2026.