Indiana Dunes National Park: the best time to visit, by the numbers
Month-by-month crowds (official NPS counts) and weather (NOAA 1991–2020 normals)
Indiana Dunes National Park draws about 2.4 million recreation visits in a typical year (2016–2025 median). July is the peak month (about 436,000 visits); January is the quietest (about 71,000) — a 6-to-1 spread between busiest and quietest.
Pick a month
| Month | Typical visits | Crowds | High / Low | Precip |
|---|---|---|---|---|
| January | 71,142 | quiet | 32°F / 18°F | 2.2 in |
| February | 85,577 | quiet | 36°F / 21°F | 2.0 in |
| March | 124,061 | quiet | 46°F / 30°F | 2.3 in |
| April | 122,599 | quiet | 57°F / 40°F | 3.5 in |
| May | 204,925 | moderate | 68°F / 50°F | 4.3 in |
| June | 330,558 | busy | 78°F / 60°F | 4.3 in |
| July | 436,351 | busiest stretch | 82°F / 64°F | 4.0 in |
| August | 397,679 | busiest stretch | 80°F / 63°F | 4.1 in |
| September | 242,939 | moderate | 74°F / 56°F | 3.6 in |
| October | 184,907 | moderate | 62°F / 45°F | 3.8 in |
| November | 95,411 | quiet | 49°F / 34°F | 2.8 in |
| December | 88,593 | quiet | 37°F / 24°F | 2.3 in |