Piscataway Park in September
September at Piscataway Park averages a daytime high near 80°F and an overnight low around 61°F, with about 4.4" of precipitation. Visitation runs about 1× the park's average month, which makes September an average month here.
- Average low
- 61°F
- Average high
- 80°F
Range across the year: 27°F to 88°F
- Precipitation
- 4.4 in
- Daylight
- 12.2 hours
Roughly 8% of the park's yearly visitors come in September: about 20,000 recreation visits in a typical year, based on National Park Service monthly counts from 1979 to 2025.
That makes September the 7th-busiest of the park's twelve months, sitting between the June peak (1.3×) and the January low (0.5×).
September is our recommended month at Piscataway: pleasant weather with noticeably thinner crowds (shoulder season).
The daily average of about 70°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 8.1 miles from the park.
Because June, July and August together draw about 31% 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 9.3-hour midwinter low and the 14.7-hour summer high.
Park-wide, 2025 drew 275,070 recreation visits, down 17.7% from 334,260 in 2024.
Across the past decade overall visitation has risen about 53.8%, 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 | 87°F / 67°F | 1.2× Busy | 41 Poor |
| September | 80°F / 61°F | 1.0× Average | 57 Fair |
| October | 68°F / 48°F | 1.2× Busy | 39 Poor |
All twelve months at Piscataway, with the best time to visit.
Things to do at Piscataway in September
The National Park Service tags 4 Piscataway activities for fall. Each links to the park's own page for it.
- Bicycle Smallwood State Park to Oxon Cove Park · 1-2 days
- Collect all the National Capital Parks - East Passport Stamps · 5-10 minutes
- Junior Ranger Programs at National Capital Parks - East · 30-90 minutes
- See Mount Vernon From Piscataway Park · 1-2 hours
Frequently Asked Questions
September averages a daytime high near 80°F and an overnight low around 61°F at Piscataway Park, with about 4.4 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 8.1 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is average at Piscataway Park (about 1.0× the average month). Our best-time score rates it "Fair" at 57/100. September is our recommended month for this park.
The busiest month is June and the quietest is January. September sits at about 1.0× the park's average, or 8% of annual visitation.
A typical September sees about 20,000 recreation visits at Piscataway Park, based on National Park Service monthly counts from 1979–2025.
Where to stay near Piscataway in September
Booking a September trip to Piscataway Park? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near Piscataway
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.