Antietam National Battlefield in May
May at Antietam National Battlefield averages a daytime high near 74°F and an overnight low around 49°F, with about 4.6" of precipitation. Visitation runs about 1.3× the park's average month, which makes May a busy month here.
- Average low
- 49°F
- Average high
- 74°F
Range across the year: 21°F to 86°F
- Precipitation
- 4.6 in
- Daylight
- 14.2 hours
Roughly 11% of the park's yearly visitors come in May: about 25,000 recreation visits in a typical year, based on National Park Service monthly counts from 1979 to 2025.
That makes May the 4th-busiest of the park's twelve months, sitting between the July peak (2×) and the January low (0.2×).
On our Best Time to Visit score May rates 58/100 ("Fair"). Our recommended month is September: pleasant weather with noticeably thinner crowds (shoulder season).
The daily average of about 61°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 4.9 miles from the park.
Because June, July and August together draw about 39% of annual visitors, choosing May instead steps outside that summer crush — the single biggest lever on how crowded the park feels.
You'll have about 14.2 hours of daylight in May to explore — between the 9.2-hour midwinter low and the 14.8-hour summer high.
Park-wide, 2024 drew 197,340 recreation visits, up 28.5% from 153,560 in 2023.
Across the past decade overall visitation has eased about 60.5%, so May may feel a touch quieter than it once did.
How May compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| April | 65°F / 39°F | 1.0× Average | 54 Fair |
| May | 74°F / 49°F | 1.3× Busy | 58 Fair |
| June | 82°F / 58°F | 1.4× Busy | 63 Good |
All twelve months at Antietam, with the best time to visit.
Things to do at Antietam in May
The National Park Service tags 4 Antietam activities for spring. Each links to the park's own page for it.
- Take a short hike on the Tidball Trail · 20-60 minutes
- Take a Short Walk on the Antietam Remembered Trail · 10-45 minutes
- The Union Advance Trail at Antietam · 30-90 minutes
- Visit Antietam National Battlefield Visitor Center · 20 minutes
Frequently Asked Questions
May averages a daytime high near 74°F and an overnight low around 49°F at Antietam National Battlefield, with about 4.6 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 4.9 miles from the park, so conditions inside the park can differ, especially at other elevations.
May is busy at Antietam National Battlefield (about 1.3× the average month). Our best-time score rates it "Fair" at 58/100. Our recommended month is September.
The busiest month is July and the quietest is January. May sits at about 1.3× the park's average, or 11% of annual visitation.
A typical May sees about 25,000 recreation visits at Antietam National Battlefield, based on National Park Service monthly counts from 1979–2025.
Where to stay near Antietam in May
Booking a May trip to Antietam National Battlefield? Compare hotels, cabins and vacation rentals near the park with live May availability and prices.
Top-rated places to stay near Antietam
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 May.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.