Indiana Dunes National Park in May
In May, Indiana Dunes National Park averages a high of 68°F and a low of 50°F, with 4.3 inches of precipitation (rain plus melted snow). About 276,000 people visit, the 4th busiest of 12 (busy). Days are 14 hours 30 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 68° / 50°F
- Precipitation
- 4.3in
- Snow
- 0in
- Daylight
- 14h 30m
- Visitors
- 276,000
- Crowds
- Busy
Best months for weather and crowds instead: April (moderate).
Weather 1991–2020 averages at Indiana Dunes Nl, IN, 3.4 miles from the park's center, 680 ft. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in May
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Sleeping Bear Dunes National Lakeshore | 62° / 43° | Quiet | Mild, wet |
| Gateway Arch National Park | 77° / 57° | Moderate | Mild, wet |
| Cuyahoga Valley National Park | 70° / 47° | Very busy | Mild, wet |
| Mammoth Cave National Park | 81° / 57° | Busy | Hot |
| Ozark National Scenic Riverways | 78° / 51° | Moderate | Mild, wet |
Closures, reservations and alerts: Indiana Dunes National Park on nps.gov
All twelve months at Indiana Dunes · National parks to visit in May