The best-month finder
Start with a famous one
- Yellowstonebest May, Jun, and Aug
- Yosemitebest Mar, Apr, and Nov
- Zionbest Feb, Jan, and Nov
- Glacierbest May, Apr, and Oct
- Death Valleybest Jan, Feb, and Dec
- Evergladesbest Nov, Oct, and Dec
- Grand Canyonbest Sep, Nov, and May
- Acadiabest Apr, May, and Nov
Or start from the season
The least crowded parks in summer · the warmest parks in winter · parks at their best in winter · parks that stay cool in summer
Fair questions
How does ParkDates decide the best month?
Four ingredients, blended in the open: how far a month sits below the park's busiest month in the 2021–2025 National Park Service visitation records, how close its average high sits to the 55–75°F comfort band (1991–2020 NOAA normals), hours of daylight at the park's latitude, and a roads-and-access signal from typical snowfall. The full formula is on every page.
Why do the answers differ from travel blogs?
Blogs tend to answer every park with June. The records often disagree — Death Valley is a winter park, the Everglades' season is the dry winter, and Yellowstone's sweet spot sits either side of the summer crush. When our answer looks surprising, the data behind it is right on the page.
Are the scores a forecast?
No. They're climatology and long-run visitation shape — the strong prior you plan around, not this week's weather. Wildfire smoke, snowpack, and road work change year to year; check the park's own current-conditions page before you go.