On Memorial Day, entry to all U.S. national parks, including Mount Rainier National Park and Olympic National Park, will be free for all U.S. residents. However, those planning outdoor holiday outings should bring rain gear: the National Weather Service in Seattle forecasts a rainy day with gusty winds. Seattle and southern areas can expect up to 6 mm (0.24 in) of precipitation, while farther north in Island County the rain will be less intense. Along the coast gusts could reach up to 64 km/h (40 mph), and thunderstorms are possible on the Olympic Peninsula and in the Chehalis Valley.
Air temperatures will be around 15–17°C (59–63°F). The usual park entrance fee ($30 per vehicle) is waived for all U.S. citizens in honor of the national holiday dedicated to service members who died in the line of duty. This is one of eight "patriotic free days" in the national parks for 2026. Notably, there were changes to this year’s list: the next free day is scheduled for June 14 — President Donald Trump’s birthday and Flag Day — while the National Park Service removed Martin Luther King Jr. Day and Juneteenth from the list.
Based on: Memorial Day 2026: Free national parks entry, rain in weather forecast