About WhenToVisitParks
When should you actually go?
What we do
WhenToVisitParks tells you the least crowded time to visit every US national park, monument, seashore and recreation area. We turn fifty years of federal visitation records into a month-by-month crowd index, pair it with climate normals and daylight, and compute a transparent best-time-to-visit score that favors the shoulder season — good weather without the peak-summer crush.
We focus on crowd levels and the best time to visit US national parks. Every page on whentovisitparks.com is built from the National Park Service Visitor Use Statistics program and the NOAA NCEI U.S. Climate Normals (1991–2020), cited and linkable so readers can trace any number back to its source.
Who runs this
WhenToVisitParks is built and maintained by the WhenToVisitParks Team. We're a small group working on making public crowd levels and the best time to visit US national parks data easier for non-specialists to read. If you have a correction, a data tip, or a question about how a number was derived, the contact email below reaches us directly.
Who this is for
WhenToVisitParks is built for road-trippers, families, photographers, hikers, RVers, and anyone planning a national-park trip who wants to avoid the crowds.
Why this exists
Public data on crowd levels and the best time to visit US national parks is technically free, but practically locked behind file formats, acronyms, and paywalled dashboards. WhenToVisitParksexists to close that gap: take the raw federal and public-sector data, and turn it into pages a normal person can read in thirty seconds.
How we work
- Primary source only. We pull from the National Park Service Visitor Use Statistics program and the NOAA NCEI U.S. Climate Normals (1991–2020) and cite the exact dataset and version on every page.
- No invented numbers. If a figure is not in the underlying public data, it does not appear on whentovisitparks.com. We never generate synthetic statistics to fill gaps.
- Methodology, in plain English. For every NPS unit that reports monthly visitation (1979–present), we compute a crowd index where 1.0 equals that park\'s average month, then identify its busiest and quietest months and its multi-decade trend. We match each park to the nearest NOAA climate-normals station for monthly temperature, precipitation and snowfall, and compute average daylight hours from latitude. The Best Time to Visit Score combines crowd avoidance (40%), weather comfort (45%) and daylight (15%); the headline recommendation surfaces the shoulder-season month with good weather but below-median crowds. Weights are published and the underlying data is public domain.
- Refreshed on a schedule. Crowd data is refreshed annually when the National Park Service publishes the prior year\'s monthly visitation; climate normals update on NOAA\'s decadal cycle.
- Corrections welcome. Readers flag issues all the time. When the source fixes a record, WhenToVisitParks follows.
Known limitations
NPS counts recreation visits, which approximate but do not exactly equal unique people, and a few remote units sit far from any climate station, so their weather figures are lower-confidence or omitted. Crowd patterns describe a typical year, so a specific holiday weekend or event can run far busier than the monthly average.
Independence
WhenToVisitParks is an independent publication. We are not funded, owned, or directed by any of the agencies, companies, or organizations that appear in our data. Hosting is paid for by advertising — see our Privacy Policy for details — and we do not take paid placements, sponsored rankings, or "remove-my-entry" fees.
History
WhenToVisitParks launched in 2026 as part of a small portfolio of independent public-data sites. It has been maintained and updated continuously since.
Contact
Tips, corrections, data-partnership questions, and press inquiries: hello@whentovisitparks.com. More options on our contact page.