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WhenToVisitParks

Upper Delaware Scenic & Recreational River in September

Very busy1.8× average month · best-time score 56/100

September at Upper Delaware Scenic & Recreational River averages a daytime high near 74°F and an overnight low around 49°F, with about 4.7" of precipitation. Visitation runs about 1.8× the park's average month, which makes September a very busy month here.

Average low
49°F
Average high
74°F

Range across the year: 15°F to 82°F

Crowds
1.8× averageVery busy
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  2. F
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Precipitation
4.7 in
Daylight
12.3 hours

Roughly 15% of the park's yearly visitors come in September: about 41,000 recreation visits in a typical year, based on National Park Service monthly counts from 1980 to 2025.

That makes September the 3rd-busiest of the park's twelve months, sitting between the July peak (2.9×) and the December low (0.2×).

On our Best Time to Visit score September rates 56/100 ("Fair"). Our recommended month is May: the lightest crowds of the park's good-weather months.

The daily average of about 62°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 1.5 miles from the park.

Because June, July and August together draw about 59% 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 9-hour midwinter low and the 15-hour summer high.

Park-wide, 2025 drew 380,245 recreation visits, up 0.8% from 377,061 in 2024.

Across the past decade overall visitation has risen about 34.9%, so a September visit is likely to feel busier than it did a few years ago.

How September compares with the months around it

MonthAvg high / lowCrowdsBest-time score
August80°F / 57°F2.6× Very busy53 Fair
September74°F / 49°F1.8× Very busy56 Fair
October62°F / 39°F0.5× Quiet59 Fair

All twelve months at Upper Delaware, with the best time to visit.

Things to do at Upper Delaware in September

The National Park Service tags 16 Upper Delaware activities for fall. Here are 8 of them. Each links to the park's own page for it.

Reviewed by WhenToVisitParks Editorial Team · Updated

Frequently Asked Questions

September averages a daytime high near 74°F and an overnight low around 49°F at Upper Delaware Scenic & Recreational River, with about 4.7 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 1.5 miles from the park, so conditions inside the park can differ, especially at other elevations.

September is very busy at Upper Delaware Scenic & Recreational River (about 1.8× the average month). Our best-time score rates it "Fair" at 56/100. Our recommended month is May.

The busiest month is July and the quietest is December. September sits at about 1.8× the park's average, or 15% of annual visitation.

A typical September sees about 41,000 recreation visits at Upper Delaware Scenic & Recreational River, based on National Park Service monthly counts from 1980–2025.

Where to stay near Upper Delaware in September

Booking a September trip to Upper Delaware Scenic & Recreational River? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.

Top-rated places to stay near Upper Delaware

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.

Visiting Upper Delaware in September?

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See the full ranking of the best national parks to visit in September.

Source: National Park Service Visitor Use Statistics (1980–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.