Indiana Dunes National Park weather in October
October in Indiana Dunes National Park: cool, rainy, with clean air — a great time to visit.
#5 of 12 months in Indiana Dunes National Park · #270 of 604 destinations to visit in October · comfort 79/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Indiana Dunes National Park climate normals — October
| Daytime high | 16°C / 61°F | 🙂 cool |
|---|---|---|
| Nighttime low | 11°C / 52°F | |
| Feels like (high) | 14°C / 57°F | |
| Rainfall | 133 mm / 5.2 in | 🌧 rainy |
| Rainy days | 14 days | |
| Humidity | 71% | 💧 humid |
| Dew point | 8°C / 46°F | |
| Sunshine | 7.2 h/day | |
| Daylight | 11.1 h | |
| Wind | 22 km/h / 14 mph | |
| Snowfall | 0.8 cm / 0.3 in | |
| Air quality (US AQI) | 33 | 🍃 good |
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 October — FAQ
- Is October a good time to visit Indiana Dunes National Park?
- October in Indiana Dunes National Park: cool, rainy, with clean air — a great time to visit. It ranks #5 of 12 months for Indiana Dunes National Park on SeasonMap's comfort score (79/100).
- What is the weather like in Indiana Dunes National Park in October?
- In October, Indiana Dunes National Park averages a daily high of 15.9°C and a low of 11.1°C, with about 133 mm of rain over roughly 13.6 rainy days.
- What is the air quality in Indiana Dunes National Park in October?
- Indiana Dunes National Park has a mean US Air Quality Index of about 33 in October.