George Washington Memorial Parkway in September
September at George Washington Memorial Parkway averages a daytime high near 79°F and an overnight low around 59°F, with about 4.5" of precipitation. Visitation runs about 1.1× the park's average month, which makes September an average month here.
- Average low
- 59°F
- Average high
- 79°F
Range across the year: 26°F to 88°F
- Precipitation
- 4.5 in
- Daylight
- 12.2 hours
Roughly 9% of the park's yearly visitors come in September: about 682,000 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 August peak (1.4×) and the January low (0.4×).
September is our recommended month at George Washington: pleasant weather with noticeably thinner crowds (shoulder season).
The daily average of about 69°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 2.6 miles from the park.
Because June, July and August together draw about 34% 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 6,732,932 recreation visits, down 0.7% from 6,782,717 in 2024.
Across the past decade overall visitation has eased about 9.7%, so September may feel a touch quieter than it once did.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 86°F / 66°F | 1.4× Busy | 37 Poor |
| September | 79°F / 59°F | 1.1× Average | 58 Fair |
| October | 68°F / 47°F | 1.1× Average | 46 Fair |
All twelve months at George Washington, with the best time to visit.
Things to do at George Washington in September
The National Park Service tags 10 George Washington activities for fall. Here are 8 of them. Each links to the park's own page for it.
- Blue Line - DC Metro · 1-2 days
- Cast Your Gaze Across the City Skyline from the Netherlands Carillon · 1-2 hours
- Clara Barton National Historic Site · 15-60 minutes
- Drive on the George Washington Memorial Parkway · 15-120 minutes
- Multi-Park Loop
- Panoramic Views at the US Marine Corps War Memorial · 1-2 hours
- Retreat to the Lyndon Baines Johnson Memorial Grove · 1-2 hours
- Silver Line - DC Metro · 1-2 days
Frequently Asked Questions
September averages a daytime high near 79°F and an overnight low around 59°F at George Washington Memorial Parkway, with about 4.5 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 2.6 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is average at George Washington Memorial Parkway (about 1.1× 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 August and the quietest is January. September sits at about 1.1× the park's average, or 9% of annual visitation.
A typical September sees about 682,000 recreation visits at George Washington Memorial Parkway, based on National Park Service monthly counts from 1979–2025.
Where to stay near George Washington in September
Booking a September trip to George Washington Memorial Parkway? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near George Washington
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.