Harpers Ferry National Historical Park in September
September at Harpers Ferry National Historical Park averages a daytime high near 78°F and an overnight low around 54°F, with about 4.4" of precipitation. Visitation runs about 1.2× the park's average month, which makes September a busy month here.
- Average low
- 54°F
- Average high
- 78°F
Range across the year: 21°F to 86°F
- Precipitation
- 4.4 in
- Daylight
- 12.2 hours
Roughly 10% of the park's yearly visitors come in September: about 36,000 recreation visits in a typical year, based on National Park Service monthly counts from 1979 to 2025.
That makes September the 6th-busiest of the park's twelve months, sitting between the July peak (1.7×) and the January low (0.1×).
September is our recommended month at Harpers Ferry: pleasant weather with noticeably thinner crowds (shoulder season).
The daily average of about 66°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 5.6 miles from the park.
Because June, July and August together draw about 38% 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 12.2 hours of daylight in September to explore — between the 9.2-hour midwinter low and the 14.8-hour summer high.
Park-wide, 2025 drew 537,876 recreation visits, up 10.2% from 488,049 in 2024.
Across the past decade overall visitation has risen about 46.8%, so a September visit is likely to feel busier than it did a few years ago.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 85°F / 61°F | 1.4× Busy | 52 Fair |
| September | 78°F / 54°F | 1.2× Busy | 58 Fair |
| October | 67°F / 42°F | 1.6× Busy | 32 Poor |
All twelve months at Harpers Ferry, with the best time to visit.
Things to do at Harpers Ferry in September
The National Park Service tags 4 Harpers Ferry activities for fall. Each links to the park's own page for it.
Frequently Asked Questions
September averages a daytime high near 78°F and an overnight low around 54°F at Harpers Ferry National Historical Park, with about 4.4 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 5.6 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is busy at Harpers Ferry National Historical Park (about 1.2× the average month). Our best-time score rates it "Fair" at 58/100. September is our recommended month for this park.
The busiest month is July and the quietest is January. September sits at about 1.2× the park's average, or 10% of annual visitation.
A typical September sees about 36,000 recreation visits at Harpers Ferry National Historical Park, based on National Park Service monthly counts from 1979–2025.
Where to stay near Harpers Ferry in September
Booking a September trip to Harpers Ferry National Historical Park? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near Harpers Ferry
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.