Lewis and Clark National Historical Park in August
August at Lewis and Clark National Historical Park averages a daytime high near 69°F and an overnight low around 54°F, with about 1.1" of precipitation. Visitation runs about 1.8× the park's average month, which makes August a very busy month here.
- Average low
- 54°F
- Average high
- 69°F
Range across the year: 37°F to 69°F
- Precipitation
- 1.1 in
- Daylight
- 14.0 hours
Roughly 15% of the park's yearly visitors come in August: about 40,000 recreation visits in a typical year, based on National Park Service monthly counts from 1979 to 2025.
That makes August the 2nd-busiest of the park's twelve months, sitting between the July peak (1.9×) and the December low (0.4×).
On our Best Time to Visit score August rates 50/100 ("Fair"). Our recommended month is May: the lightest crowds of the park's good-weather months.
The daily average of about 61°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 5.4 miles from the park.
August 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 14 hours of daylight in August 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.
How August compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| July | 67°F / 54°F | 1.9× Very busy | 49 Fair |
| August | 69°F / 54°F | 1.8× Very busy | 50 Fair |
| September | 68°F / 51°F | 1.2× Busy | 58 Fair |
All twelve months at Lewis and Clark, with the best time to visit.
Things to do at Lewis and Clark in August
The National Park Service tags 12 Lewis and Clark activities for summer. Here are 8 of them. Each links to the park's own page for it.
- See the Pacific at Cape Disappointment · 2-4 hours
- Clay Pit Pond Trail · 15-60 minutes
- Continue South to Find a Whale · 1-4 hours
- Find a Salt Camp in Seaside · 5-10 minutes
- Fort Clatsop Audio Tour · 20-60 minutes
- Kwis Kwis Trail · 1-5 hours
- Netul River Trail · 20-60 minutes
- Stretch Your Legs at the Dismal Nitch Wayside · 5-30 minutes
Frequently Asked Questions
August averages a daytime high near 69°F and an overnight low around 54°F at Lewis and Clark National Historical Park, with about 1.1 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 5.4 miles from the park, so conditions inside the park can differ, especially at other elevations.
August is very busy at Lewis and Clark National Historical Park (about 1.8× the average month). Our best-time score rates it "Fair" at 50/100. Our recommended month is May.
The busiest month is July and the quietest is December. August sits at about 1.8× the park's average, or 15% of annual visitation.
A typical August sees about 40,000 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 August
Booking a August trip to Lewis and Clark National Historical Park? Compare hotels, cabins and vacation rentals near the park with live August availability and prices.
Top-rated places to stay near Lewis and Clark
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See the full ranking of the best national parks to visit in August.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.