World War II Memorial in September
September at World War II Memorial averages a daytime high near 81°F and an overnight low around 64°F, with about 3.9" of precipitation. Visitation runs about 1× the park's average month, which makes September an average month here.
- Average low
- 64°F
- Average high
- 81°F
Range across the year: 30°F to 90°F
- Precipitation
- 3.9 in
- Daylight
- 12.2 hours
Roughly 9% of the park's yearly visitors come in September: about 373,000 recreation visits in a typical year, based on National Park Service monthly counts from 2004 to 2025.
That makes September the 8th-busiest of the park's twelve months, sitting between the May peak (1.5×) and the January low (0.4×).
September is our recommended month at World War II Memorial: pleasant weather with noticeably thinner crowds (shoulder season).
The daily average of about 72°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 2.9 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 3,993,717 recreation visits, down 22.6% from 5,160,769 in 2024.
Across the past decade overall visitation has risen about 7.9%, 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 | 88°F / 71°F | 1.1× Average | 44 Poor |
| September | 81°F / 64°F | 1.0× Average | 59 Fair |
| October | 69°F / 52°F | 1.1× Average | 50 Fair |
All twelve months at World War II Memorial, with the best time to visit.
Frequently Asked Questions
September averages a daytime high near 81°F and an overnight low around 64°F at World War II Memorial, with about 3.9 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 2.9 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is average at World War II Memorial (about 1.0× the average month). Our best-time score rates it "Fair" at 59/100. September is our recommended month for this park.
The busiest month is May and the quietest is January. September sits at about 1.0× the park's average, or 9% of annual visitation.
A typical September sees about 373,000 recreation visits at World War II Memorial, based on National Park Service monthly counts from 2004–2025.
Where to stay near World War II Memorial in September
Booking a September trip to World War II Memorial? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near World War II Memorial
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See the full ranking of the best national parks to visit in September.
Source: National Park Service Visitor Use Statistics (2004–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.