August is a good month at Indiana Dunes — it ranks 8th of the twelve here. Expect about 17% fewer visitors than July, the park's peak — 423,561 visits on average. Days run around 80°F by afternoon and 63°F at night, with 13.8 hours of daylight.
August against the park's best
| Month | Verdict | Avg. visits | vs. peak | High | Low | Snow | Daylight |
|---|---|---|---|---|---|---|---|
| August (this page) | Good | 423,561 | −17% | 80°F | 63°F | 0" | 13.8 h |
| April (best) | Excellent | 166,419 | −67% | 57°F | 40°F | 0.6" | 13.3 h |
| July (peak crowds) | Good | 509,715 | peak | 82°F | 64°F | 0" | 14.9 h |
Weather figures are for the Porter area — the Indiana Dunes Nl station. Visits are 2021–2025 averages; climate normals cover 1991–2020. Conditions vary across the park; check current status before you go.
Common questions
Is August a good time to visit Indiana Dunes?
It is a reasonable month — the park has stronger ones, but the records don't argue against it. August ranks 8 of 12 at Indiana Dunes on crowds, weather, daylight, and access together.
How crowded is Indiana Dunes in August?
About 423,561 recreation visits on average — 17% below July, the park's peak.
How warm is Indiana Dunes in August?
Average highs around 80°F and lows around 63°F at the Indiana Dunes Nl station.
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