First State National Historical Park in September
September at First State National Historical Park averages a daytime high near 75°F and an overnight low around 59°F, with about 5.1" of precipitation. Visitation runs about 0.9× the park's average month, which makes September an average month here.
- Average low
- 59°F
- Average high
- 75°F
Range across the year: 24°F to 84°F
- Precipitation
- 5.1 in
- Daylight
- 12.2 hours
Roughly 8% of the park's yearly visitors come in September: about 15,000 recreation visits in a typical year, based on National Park Service monthly counts from 2023 to 2025.
That makes September the 6th-busiest of the park's twelve months, sitting between the October peak (2.4×) and the January low (0.4×).
September is our recommended month at First State: pleasant weather with noticeably thinner crowds (shoulder season).
The daily average of about 67°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 4.1 miles from the park.
Because June, July and August together draw about 39% 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 200,173 recreation visits, down 4.2% from 208,870 in 2024.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 82°F / 66°F | 1.1× Average | 69 Good |
| September | 75°F / 59°F | 0.9× Average | 74 Good |
| October | 63°F / 47°F | 2.4× Very busy | 30 Poor |
All twelve months at First State, with the best time to visit.
Frequently Asked Questions
September averages a daytime high near 75°F and an overnight low around 59°F at First State National Historical Park, with about 5.1 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 4.1 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is average at First State National Historical Park (about 0.9× the average month). Our best-time score rates it "Good" at 74/100. September is our recommended month for this park.
The busiest month is October and the quietest is January. September sits at about 0.9× the park's average, or 8% of annual visitation.
A typical September sees about 15,000 recreation visits at First State National Historical Park, based on National Park Service monthly counts from 2023–2025.
Where to stay near First State in September
Booking a September trip to First State National Historical Park? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near First State
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 First State in September?
Get crowd forecasts and lodging deals for First State by email. No spam, unsubscribe anytime.
See the full ranking of the best national parks to visit in September.
Source: National Park Service Visitor Use Statistics (2023–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.