Seven-day forecast rankings across every U.S. national park and monument — scored daily by temperature, clouds, humidity, wind, and precipitation.
Search any national park or monument to see its 7-day PWI score and forecast.
Rankings recalculated each morning from National Weather Service forecast data.
Detailed 7-day weather rankings for the most-visited national parks in the U.S.
Every park is scored daily using the Perfect Weather Index (PWI) — a 1 to 10 comfort rating combining forecast temperature, cloud cover, humidity, wind speed, and precipitation probability.
A score of 8 or higher means excellent conditions for hiking, sightseeing, and outdoor activity. Scores below 4 reflect heat, storms, or other limiting conditions. Rankings refresh each morning from NWS forecast data.
Desert parks like Zion, Grand Canyon, and Death Valley peak in spring and fall when temperatures are moderate. Mountain parks like Rocky Mountain and Yellowstone shine in summer after snow clears.
Coastal and eastern parks like Acadia and Great Smoky Mountains offer strong conditions across a wider range of months. Use the 7-day tabs to compare side by side.
The 7-day rankings here are ideal for near-term planning. For longer horizons, our Best Weather by Month guide shows which regions tend to perform best throughout the year.
PWI is a comfort-focused score — not just a raw forecast. It weights each variable (temperature, wind, humidity, clouds, precipitation) to reflect how humans actually experience outdoor conditions.
Scores are consistent across every park, so comparing Glacier at 7.2 vs. Bryce Canyon at 8.7 is apples-to-apples, not a local-bias artifact.
How It Works →