Updated October 2026
Indiana Dunes State Park: Weather by Month and When to Go
Indiana Dunes State Park is a state park in Indiana. The USGS Protected Areas Database maps about 560 acres under its name. Average highs range from 32°F in January to 82°F in July.
Average highs sit between 60°F and 80°F in May through June and August through October. They run above 80°F in July and below 60°F in November through April. The figures are NOAA climate normals for 1991–2020, measured at a weather station 2.4 miles from the park.
Warmest average high
82°F
July
Coldest average low
18°F
January
Most precipitation
4.3 in
May and June
Longest days
15.0 h
June
Indiana Dunes State Park weather by month
| Month | Average high | Average low | Precipitation | Snowfall | Daylight |
|---|---|---|---|---|---|
| January | 32°F | 18°F | 2.2 in | 16.0 in | 9.3 h |
| February | 36°F | 21°F | 2.0 in | 9.7 in | 10.4 h |
| March | 46°F | 30°F | 2.3 in | 6.0 in | 11.7 h |
| April | 57°F | 40°F | 3.6 in | 0.6 in | 13.1 h |
| May | 68°F | 50°F | 4.3 in | 0.0 in | 14.3 h |
| June | 78°F | 60°F | 4.3 in | 0.0 in | 15.0 h |
| July | 82°F | 64°F | 4.0 in | 0.0 in | 14.7 h |
| August | 80°F | 63°F | 4.1 in | 0.0 in | 13.7 h |
| September | 74°F | 56°F | 3.7 in | 0.0 in | 12.3 h |
| October | 62°F | 45°F | 3.8 in | 0.0 in | 10.8 h |
| November | 49°F | 34°F | 2.8 in | 0.7 in | 9.6 h |
| December | 37°F | 24°F | 2.3 in | 7.3 in | 9.0 h |
Temperature, precipitation and snowfall figures are NOAA climate normals for 1991–2020 from station USC00124244, the nearest station with a complete set of temperature normals, 2.4 miles from the park. Conditions in the park can differ from the station's, most of all where the two sit at different elevations. Daylight is calculated for the park's latitude at the middle of each month. The acreage is what the USGS Protected Areas Database maps under the park's name. The state's own figure can differ, because the database may hold part of a park under another name.
What the averages show
- Temperature. July is the warmest month, with an average high of 82°F and an average low of 64°F. January is the coldest month, with an average low of 18°F and an average high of 32°F.
- Precipitation. May and June are the wettest months, each averaging 4.3 inches of precipitation, and February is the driest, at 2.0 inches. An average year brings about 39.4 inches in total.
- Snowfall. The station averages 40.3 inches of snow a year, with the most in January (16.0 inches).
- Daylight. Days run from about 9.0 hours of daylight in December to 15.0 hours in June.
Camping, trails, maps and fees
Whether Indiana Dunes State Park has camping or cabins, where its trails run, when it opens and what it charges are all published by the agency that runs the park. Its official page is the place to check before a trip.
Official Indiana Dunes State Park page
For the forecast rather than the averages, the National Weather Service issues a point forecast for the park's location.
National Weather Service forecast for Indiana Dunes State Park
Where to stay near Indiana Dunes State Park
Hotels, cabins and vacation rentals near Indiana Dunes State Park, with live availability and prices.
Top-rated places to stay near Indiana Dunes State Park
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Frequently Asked Questions
July is the warmest month, with an average high of 82°F and an average low of 64°F. January is the coldest month, with an average low of 18°F and an average high of 32°F. These are NOAA 1991–2020 climate normals from a weather station 2.4 miles from the park.
Average highs sit between 60°F and 80°F in May through June and August through October. They run above 80°F in July and below 60°F in November through April.
May and June are the wettest months, each averaging 4.3 inches of precipitation, and February is the driest, at 2.0 inches. An average year brings about 39.4 inches in total. Snowfall averages 40.3 inches a year, with the most in January.
Days run from about 9.0 hours of daylight in December to 15.0 hours in June. The hours are calculated for the park's latitude.
Nearest National Park Service sites
- Indiana Dunes National Park2 miles away
- Pullman National Historical Park29 miles away
- Lincoln Home National Historic Site187 miles away
Nearby state parks
- Warren Dunes State Park30 miles away · Michigan
- Potato Creek State Park37 miles away
- Saugatuck Dunes State Park84 miles away · Michigan
- Holland State Park89 miles away · Michigan
Distances are measured in a straight line from the park, so the drive is longer.
Sources: NOAA NCEI U.S. Climate Normals 1991–2020; USGS Protected Areas Database for location and acreage; the official Indiana state park listing for the park's name.