How Crowded Is Lewis and Clark National Historical Park in July?
July runs about 1.9× Lewis and Clark National Historical Park's average month, which makes it a very busy month here — roughly 16% of the park's yearly visitors come in July.
In a typical July the park sees about 42,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.
It is the single busiest month of the year at Lewis and Clark; December, the quietest, runs only about 0.4× the average — a 5-to-1 swing between high and low season.
On our Best Time to Visit score July rates 49/100 ("Fair"), versus the top-rated May at 59/100 — best overall balance of crowds, weather and daylight.
Typical July weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 67°F and an overnight low around 54°F, with about 0.8" of precipitation.
That average of about 61°F is a comfortable range for hiking and being outdoors all day.
July falls inside the park's busiest stretch: June, July and August together pull about 44% of the year's visitors, so a visit this month means sharing the park with the peak-season crowd.
You'll have about 15.2 hours of daylight in July to explore — between the 8.4-hour midwinter low and the 15.6-hour summer high.
Park-wide, 2025 drew 244,195 recreation visits, down 8.6% from 267,118 in 2024.
Frequently Asked Questions
July is very busy at Lewis and Clark National Historical Park (about 1.9× the average month). Our best-time score rates it "Fair". The single best month overall is May.
The busiest month is July and the quietest is December. July sits at about 1.9× the park's average, or 16% of annual visitation.
A typical July sees about 42,000 recreation visits at Lewis and Clark National Historical Park, based on National Park Service monthly counts from 1979–2025.
Where to stay near Lewis and Clark in July
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Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-07-14.