Indiana Dunes National Park weather in July
July in Indiana Dunes National Park: hot, rainy, with very humid — a great time to visit.
#8 of 12 months in Indiana Dunes National Park · #378 of 604 destinations to visit in July · comfort 73/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Indiana Dunes National Park climate normals — July
| Daytime high | 26°C / 79°F | 🥵 hot |
|---|---|---|
| Nighttime low | 21°C / 70°F | |
| Feels like (high) | 29°C / 84°F | |
| Rainfall | 98 mm / 3.8 in | 🌧 rainy |
| Rainy days | 11 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 18°C / 65°F | |
| Sunshine | 12 h/day | |
| Daylight | 14.8 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 63 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Indiana Dunes National Park in July — FAQ
- Is July a good time to visit Indiana Dunes National Park?
- July in Indiana Dunes National Park: hot, rainy, with very humid — a great time to visit. It ranks #8 of 12 months for Indiana Dunes National Park on SeasonMap's comfort score (73/100).
- What is the weather like in Indiana Dunes National Park in July?
- In July, Indiana Dunes National Park averages a daily high of 26.1°C and a low of 20.9°C, with about 97.6 mm of rain over roughly 11.2 rainy days.
- What is the air quality in Indiana Dunes National Park in July?
- Indiana Dunes National Park has a mean US Air Quality Index of about 63 in July.