Visitation · National Historical Park

San Juan Island National Historical Park visitation by month and year

July is the busiest month at San Juan Island, when the average temperature nearby is 61 degrees. December is the quietest, and the average temperature then is 42 degrees. July runs about 3.9 times the visits of December. The crowd arrives with the warm weather and leaves with it. Annual visits rose 43.9 percent from 292,507 in 2019 to 420,922 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 Friday Harbor AP, 2 miles from the park's reference point at 109 feet, station USW00094276 in the NOAA 1991 to 2020 climate normals. The lower panel is monthly rain from the same station, which publishes no snowfall normal.

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	420,922	+3.7%
2024	405,925	-11.4%
2023	457,989	-34.6%
2022	700,325	+9.8%
2021	638,066	+49.7%
2020	426,335	+45.8%
2019	292,507	+14.7%
2018	255,032	-4.6%
2017	267,209	-15.5%
2016	316,122	+22.2%

Visitation at other parks

Olympic National Park Mount Rainier National Park Chesapeake & Ohio Canal National Historical Park San Francisco Maritime 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 USW00094276, 109 feet above sea level. Data refreshed October 14, 2026.