Frederick Law Olmsted National Historic Site in May
May at Frederick Law Olmsted National Historic Site averages a daytime high near 69°F and an overnight low around 48°F, with about 3.6" of precipitation. Visitation runs about 1× the park's average month, which makes May an average month here.
- Average low
- 48°F
- Average high
- 69°F
Range across the year: 19°F to 85°F
- Precipitation
- 3.6 in
- Daylight
- 14.4 hours
Roughly 8% of the park's yearly visitors come in May: about 730 recreation visits in a typical year, based on National Park Service monthly counts from 1981 to 2025.
That makes May the 6th-busiest of the park's twelve months, sitting between the July peak (1.8×) and the January low (0.2×).
May is our recommended month at Frederick Law Olmsted: pleasant weather with noticeably thinner crowds (shoulder season).
The daily average of about 59°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 1.5 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 14.4 hours of daylight in May to explore — between the 8.9-hour midwinter low and the 15.1-hour summer high.
Park-wide, 2025 drew 7,240 recreation visits, down 45.2% from 13,218 in 2024.
Across the past decade overall visitation has risen about 25.3%, so a May visit is likely to feel busier than it did a few years ago.
How May compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| April | 59°F / 38°F | 0.9× Average | 50 Fair |
| May | 69°F / 48°F | 0.9× Average | 63 Good |
| June | 79°F / 58°F | 1.2× Busy | 67 Good |
All twelve months at Frederick Law Olmsted, with the best time to visit.
Frequently Asked Questions
May averages a daytime high near 69°F and an overnight low around 48°F at Frederick Law Olmsted National Historic Site, with about 3.6 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 1.5 miles from the park, so conditions inside the park can differ, especially at other elevations.
May is average at Frederick Law Olmsted National Historic Site (about 0.9× the average month). Our best-time score rates it "Good" at 63/100. May is our recommended month for this park.
The busiest month is July and the quietest is January. May sits at about 0.9× the park's average, or 8% of annual visitation.
A typical May sees about 1,000 recreation visits at Frederick Law Olmsted National Historic Site, based on National Park Service monthly counts from 1981–2025.
Where to stay near Frederick Law Olmsted in May
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See the full ranking of the best national parks to visit in May.
Source: National Park Service Visitor Use Statistics (1981–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.