Hawaii
National parks in Hawaii
Hawaii has 2 national parks and 3 other busy National Park System sites in this guide. The best months below balance mild weather and crowds.
| Park | Best months | Busiest | July high / January low °F | Visitors a year |
|---|---|---|---|---|
| Hawai'i Volcanoes National Park | May, Aug and Sep | Jan | 73° / 49° | 1,644,000 |
| Haleakala National Park | Apr, Aug and Sep | May | 66° / 44° | 792,000 |
| Pearl Harbor National Memorial | Jan and Feb | Jul | 88° / 67° | 1,605,000 |
| Pu'uhonua o Honaunau National Historical Park | Apr, Jun and Nov | Feb | 77° / 57° | 389,000 |
| Kaloko-Honokohau National Historical Park | Jan and Feb | Mar | 86° / 69° | 335,000 |
Hawaii parks by month
| Month | Visitors, all 5 sites | Sites with mild weather |
|---|---|---|
| January | 422,000 | Pu'uhonua o Honaunau National Historical Park |
| February | 396,000 | Hawai'i Volcanoes, Pu'uhonua o Honaunau National Historical Park |
| March | 425,000 | none |
| April | 385,000 | Haleakala, Pu'uhonua o Honaunau National Historical Park |
| May | 377,000 | Hawai'i Volcanoes, Haleakala |
| June | 442,000 | Hawai'i Volcanoes, Haleakala, Pu'uhonua o Honaunau National Historical Park |
| July | 448,000 | Hawai'i Volcanoes, Haleakala |
| August | 395,000 | Hawai'i Volcanoes, Haleakala |
| September | 349,000 | Hawai'i Volcanoes, Haleakala |
| October | 347,000 | none |
| November | 348,000 | Pu'uhonua o Honaunau National Historical Park |
| December | 432,000 | Pu'uhonua o Honaunau National Historical Park |
Weather 1991–2020 NOAA normals at each park's nearest station. Visitors National Park Service recreation visits, 2023–2025 average. Mild means an average high of 55–80°F without above-normal rain.