Hopewell Furnace National Historic Site in September
September at Hopewell Furnace National Historic Site averages a daytime high near 76°F and an overnight low around 55°F. Visitation runs about 1.4× the park's average month, which makes September a busy month here.
- Average low
- 55°F
- Average high
- 76°F
Range across the year: 21°F to 85°F
- Daylight
- 12.3 hours
Roughly 12% of the park's yearly visitors come in September: roughly 6,100 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 (1.6×) and the January low (0.3×).
On our Best Time to Visit score September rates 56/100 ("Fair"). Our recommended month is October: pleasant weather with noticeably thinner crowds (shoulder season).
The daily average of about 65°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 7 miles from the park.
Because June, July and August together draw about 37% 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 9.1-hour midwinter low and the 14.8-hour summer high.
Park-wide, 2024 drew 48,776 recreation visits, down 10.2% from 54,293 in 2023.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 82°F / 62°F | 1.6× Very busy | 51 Fair |
| September | 76°F / 55°F | 1.4× Busy | 56 Fair |
| October | 64°F / 44°F | 1.2× Busy | 47 Fair |
All twelve months at Hopewell Furnace, with the best time to visit.
Frequently Asked Questions
September averages a daytime high near 76°F and an overnight low around 55°F at Hopewell Furnace National Historic Site. These are 1991–2020 NOAA climate normals from the nearest station, about 7 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is busy at Hopewell Furnace National Historic Site (about 1.4× the average month). Our best-time score rates it "Fair" at 56/100. Our recommended month is October.
The busiest month is August and the quietest is January. September sits at about 1.4× the park's average, or 12% of annual visitation.
A typical September sees about 6,000 recreation visits at Hopewell Furnace National Historic Site, based on National Park Service monthly counts from 1979–2025.
Where to stay near Hopewell Furnace in September
Booking a September trip to Hopewell Furnace National Historic Site? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near Hopewell Furnace
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 September.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.