Weir Farm National Historical Park in September
September at Weir Farm National Historical Park averages a daytime high near 74°F and an overnight low around 52°F, with about 4.8" of precipitation. Visitation runs about 1.4× the park's average month, which makes September a busy month here.
- Average low
- 52°F
- Average high
- 74°F
Range across the year: 18°F to 82°F
- Precipitation
- 4.8 in
- Daylight
- 12.3 hours
Roughly 12% of the park's yearly visitors come in September: roughly 4,000 recreation visits in a typical year, based on National Park Service monthly counts from 1993 to 2025.
That makes September the 5th-busiest of the park's twelve months, sitting between the August peak (1.6×) and the February low (0.3×).
On our Best Time to Visit score September rates 48/100 ("Fair"). Our recommended month is May: pleasant weather with noticeably thinner crowds (shoulder season).
The daily average of about 63°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 miles from the park.
Because June, July and August together draw about 40% 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 30,339 recreation visits, down 11.4% from 34,246 in 2024.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 80°F / 60°F | 1.6× Very busy | 47 Fair |
| September | 74°F / 52°F | 1.4× Busy | 48 Fair |
| October | 62°F / 41°F | 1.6× Busy | 27 Poor |
All twelve months at Weir Farm, with the best time to visit.
Things to do at Weir Farm in September
The National Park Service tags 6 Weir Farm activities for fall. Each links to the park's own page for it.
- Become a Weir Farm Junior Ranger · 15-120 minutes
- Take a Guided Tour at Weir Farm · 10-60 minutes
- Visit the Burlingham House Visitor Center · 15-60 minutes
- Art in the Park · 15-120 minutes
- Take a Self-Guided Tour of Weir Farm · 30-120 minutes
- Walk to Weir Pond · 30-90 minutes
Frequently Asked Questions
September averages a daytime high near 74°F and an overnight low around 52°F at Weir Farm National Historical Park, with about 4.8 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 8 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is busy at Weir Farm National Historical Park (about 1.4× the average month). Our best-time score rates it "Fair" at 48/100. Our recommended month is May.
The busiest month is August and the quietest is February. September sits at about 1.4× the park's average, or 12% of annual visitation.
A typical September sees about 4,000 recreation visits at Weir Farm National Historical Park, based on National Park Service monthly counts from 1993–2025.
Where to stay near Weir Farm in September
Booking a September trip to Weir Farm National Historical Park? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near Weir Farm
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 (1993–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.