Antietam National Battlefield visitation by month and year
September is the busiest month at Antietam, when the average temperature nearby is 66 degrees. January is the quietest, and the average temperature then is 31 degrees. September runs about 7.5 times the visits of January. The warmest month is July, a little off the peak. Annual visits fell 44.0 percent, from 287,343 in 2019 to 161,006 in 2025.
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Visits by month, with temperature and precipitation
Annual visits, 1979 to 2025
The last ten years
| Year | Recreation visits | Change on prior year |
|---|---|---|
| 2025 | 161,006 | -18.4% |
| 2024 | 197,340 | +28.5% |
| 2023 | 153,560 | +32.8% |
| 2022 | 115,619 | +4.6% |
| 2021 | 110,544 | +28.7% |
| 2020 | 85,884 | -70.1% |
| 2019 | 287,343 | -11.9% |
| 2018 | 326,197 | -11.0% |
| 2017 | 366,508 | +4.1% |
| 2016 | 351,911 | +1.4% |
Visitation at other parks
Source: NPS Visitor Use Statistics, monthly recreation visits, as compiled for Publicopia Labs. A year is shown only when all twelve months were reported. Temperature, precipitation and snowfall normals are the 1991 to 2020 monthly averages published by NOAA NCEI for station USC00188207, 400 feet above sea level. Data refreshed October 14, 2026.