World War I Memorial in September
September at World War I Memorial averages a daytime high near 81°F and an overnight low around 64°F, with about 3.9" of precipitation. Visitation runs about 0.9× 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 8% of the park's yearly visitors come in September: about 75,000 recreation visits in a typical year, based on National Park Service monthly counts from 2021 to 2025.
That makes September the 8th-busiest of the park's twelve months, sitting between the April peak (1.5×) and the January low (0.4×).
September is our recommended month at World War I 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 3.4 miles from the park.
Because June, July and August together draw about 27% 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 838,999 recreation visits, down 22.7% from 1,084,897 in 2024.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 88°F / 71°F | 0.9× Average | 55 Fair |
| September | 81°F / 64°F | 0.9× Average | 65 Good |
| October | 69°F / 52°F | 1.1× Average | 55 Fair |
All twelve months at World War I 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 I Memorial, with about 3.9 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 3.4 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is average at World War I Memorial (about 0.9× the average month). Our best-time score rates it "Good" at 65/100. September is our recommended month for this park.
The busiest month is April and the quietest is January. September sits at about 0.9× the park's average, or 8% of annual visitation.
A typical September sees about 75,000 recreation visits at World War I Memorial, based on National Park Service monthly counts from 2021–2025.
Where to stay near World War I Memorial in September
Booking a September trip to World War I Memorial? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near World War I 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 (2021–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.