San Juan Island National Historical Park in June
June at San Juan Island National Historical Park averages a daytime high near 68°F and an overnight low around 48°F, with about 0.8" of precipitation. Visitation runs about 1.6× the park's average month, which makes June a busy month here.
- Average low
- 48°F
- Average high
- 68°F
Range across the year: 37°F to 73°F
- Precipitation
- 0.8 in
- Daylight
- 15.9 hours
Roughly 13% of the park's yearly visitors come in June: about 55,000 recreation visits in a typical year, based on National Park Service monthly counts from 1979 to 2025.
That makes June the 3rd-busiest of the park's twelve months, sitting between the July peak (1.8×) and the January low (0.5×).
On our Best Time to Visit score June rates 55/100 ("Fair"). Our recommended month is October: the lightest crowds of the park's good-weather months.
The daily average of about 58°F is a comfortable range for hiking and being outdoors all day. These figures are 1991–2020 NOAA climate normals from the nearest station, about 1.7 miles from the park.
June falls inside the park's busiest stretch: June, July and August together pull about 42% of the year's visitors, so a visit this month means sharing the park with the peak-season crowd.
You'll have about 15.9 hours of daylight in June to explore — near the year-round maximum.
Park-wide, 2025 drew 420,922 recreation visits, up 3.7% from 405,925 in 2024.
Across the past decade overall visitation has risen about 68.5%, so a June visit is likely to feel busier than it did a few years ago.
How June compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| May | 64°F / 44°F | 1.1× Average | 61 Good |
| June | 68°F / 48°F | 1.6× Busy | 55 Fair |
| July | 72°F / 50°F | 1.8× Very busy | 51 Fair |
All twelve months at San Juan Island, with the best time to visit.
Things to do at San Juan Island in June
The National Park Service tags 8 San Juan Island activities for summer. Each links to the park's own page for it.
Frequently Asked Questions
June averages a daytime high near 68°F and an overnight low around 48°F at San Juan Island National Historical Park, with about 0.8 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 1.7 miles from the park, so conditions inside the park can differ, especially at other elevations.
June is busy at San Juan Island National Historical Park (about 1.6× the average month). Our best-time score rates it "Fair" at 55/100. Our recommended month is October.
The busiest month is July and the quietest is January. June sits at about 1.6× the park's average, or 13% of annual visitation.
A typical June sees about 55,000 recreation visits at San Juan Island National Historical Park, based on National Park Service monthly counts from 1979–2025.
Where to stay near San Juan Island in June
Booking a June trip to San Juan Island National Historical Park? Compare hotels, cabins and vacation rentals near the park with live June availability and prices.
Top-rated places to stay near San Juan Island
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
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See the full ranking of the best national parks to visit in June.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.