Olympic National Park in September
September at Olympic National Park averages a daytime high near 68°F and an overnight low around 48°F, with about 1.6" of precipitation. Visitation runs about 1.6× the park's average month, which makes September a busy month here.
- Average low
- 48°F
- Average high
- 68°F
Range across the year: 33°F to 75°F
- Precipitation
- 1.6 in
- Daylight
- 12.3 hours
Roughly 13% of the park's yearly visitors come in September: about 400,000 recreation visits in a typical year, based on National Park Service monthly counts from 1979 to 2025.
That makes September the 3rd-busiest of the park's twelve months, sitting between the August peak (2.6×) and the December low (0.3×).
On our Best Time to Visit score September rates 59/100 ("Fair"). Our recommended month is May: 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 15.1 miles from the park.
Because June, July and August together draw about 50% of annual visitors, choosing September instead steps outside that summer crush — the single biggest lever on how crowded the park feels.
You'll have about 12.3 hours of daylight in September to explore — between the 8.2-hour midwinter low and the 15.8-hour summer high.
Park-wide, 2025 drew 3,584,187 recreation visits, down 3.6% from 3,717,267 in 2024.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 75°F / 52°F | 2.6× Very busy | 49 Fair |
| September | 68°F / 48°F | 1.6× Busy | 59 Fair |
| October | 56°F / 42°F | 0.8× Quiet | 51 Fair |
All twelve months at Olympic, with the best time to visit.
Things to do at Olympic in September
The National Park Service tags 7 Olympic activities for fall. Each links to the park's own page for it.
- Watch for Salmon at Salmon Cascades · 15-45 minutes
- Backpack in Olympic National Park · reservation required
- Go to the Beach
- See Madison Falls · 5-15 minutes
- Take a Pet-Friendly Hike
- Take a Short Hike Near the Visitor Center · 15-30 minutes
- Walk the Moments in Time Trail · 15-30 minutes
Frequently Asked Questions
September averages a daytime high near 68°F and an overnight low around 48°F at Olympic National Park, with about 1.6 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 15.1 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is busy at Olympic National Park (about 1.6× the average month). Our best-time score rates it "Fair" at 59/100. Our recommended month is May.
The busiest month is August and the quietest is December. September sits at about 1.6× the park's average, or 13% of annual visitation.
A typical September sees about 400,000 recreation visits at Olympic National Park, based on National Park Service monthly counts from 1979–2025.
Where to stay near Olympic in September
Booking a September trip to Olympic National Park? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near Olympic
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
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See the full ranking of the best national parks to visit in September.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.