Boston National Historical Park in September
September at Boston National Historical Park averages a daytime high near 73°F and an overnight low around 58°F, with about 3.6" of precipitation. Visitation runs about 1.3× the park's average month, which makes September a busy month here.
- Average low
- 58°F
- Average high
- 73°F
Range across the year: 23°F to 82°F
- Precipitation
- 3.6 in
- Daylight
- 12.3 hours
Roughly 11% of the park's yearly visitors come in September: about 293,000 recreation visits in a typical year, based on National Park Service monthly counts from 1979 to 2025.
That makes September the 5th-busiest of the park's twelve months, sitting between the July peak (1.9×) and the January low (0.3×).
On our Best Time to Visit score September rates 60/100 ("Good"). Our recommended month is May: 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 2.4 miles from the park.
Because June, July and August together draw about 42% 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 8.9-hour midwinter low and the 15.1-hour summer high.
Park-wide, 2025 drew 2,383,812 recreation visits, down 13.1% from 2,744,458 in 2024.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 80°F / 65°F | 1.7× Very busy | 52 Fair |
| September | 73°F / 58°F | 1.3× Busy | 60 Good |
| October | 62°F / 48°F | 1.4× Busy | 43 Poor |
All twelve months at Boston, with the best time to visit.
Things to do at Boston in September
The National Park Service tags 28 Boston activities for fall. Here are 8 of them. Each links to the park's own page for it.
- History at Sunset Walking Tours · 75-90 minutes · reservation required
- The Freedom Trail: Enemies to this Country Guided Tour · 75 minutes · reservation required
- Walk the Black Heritage Trail® · 60-90 minutes · reservation required
- Charlestown Navy Yard: Tour USS CASSIN YOUNG (DD 793) · 45 minutes
- Old North Church: Audio Tour · 0-35 minutes
- Old North Church: Balcony Tours · 15 minutes
- Old North Church: Crypt Tour · 25 minutes
- Become a Bark Ranger · 5-15 minutes
Frequently Asked Questions
September averages a daytime high near 73°F and an overnight low around 58°F at Boston National Historical Park, with about 3.6 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 2.4 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is busy at Boston National Historical Park (about 1.3× the average month). Our best-time score rates it "Good" at 60/100. Our recommended month is May.
The busiest month is July and the quietest is January. September sits at about 1.3× the park's average, or 11% of annual visitation.
A typical September sees about 293,000 recreation visits at Boston National Historical Park, based on National Park Service monthly counts from 1979–2025.
Where to stay near Boston in September
Booking a September trip to Boston National Historical Park? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near Boston
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.