Indiana Dunes National Park Climate and Average Weather
Climate of Indiana Dunes National Park: average temperatures, rainfall and seasons month by month.
Climate in Indiana Dunes National Park month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 30° | 20° | 3,1 in | ★★☆☆☆ |
| February | 40° | 26° | 1,1 in | ★★★☆☆ |
| March | 53° | 34° | 4,6 in | ★★★☆☆ |
| April | 60° | 43° | 4,5 in | ★★★☆☆ |
| May | 67° | 51° | 2,8 in | ★★★★☆ |
| June | 78° | 63° | 5,4 in | ★★★★☆ |
| July | 81° | 67° | 4,3 in | ★★★★☆ |
| August | 78° | 65° | 3,8 in | ★★★★☆ |
| September | 75° | 60° | 2,4 in | ★★★★☆ |
| October | 64° | 50° | 3,7 in | ★★★★☆ |
| November | 50° | 39° | 3,3 in | ★★★☆☆ |
| December | 39° | 29° | 3,1 in | ★★☆☆☆ |
Climate type: Continental. Source: Open-Meteo archive (ERA5).
Recent extremes in Indiana Dunes National Park
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Indiana Dunes National Park compares with nearby places
Annual averages, and the difference against Indiana Dunes National Park.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| ZIP Code 60601 | 34 mi | 52°F | about the same | 40 in |
| Area Code 312 | 34 mi | 52°F | about the same | 40 in |
| Cook County | 34 mi | 52°F | about the same | 40 in |
| Chicago | 34 mi | 52°F | about the same | 40 in |
| The Loop | 34 mi | 52°F | about the same | 40 in |
Best time to visit Indiana Dunes National Park
Go in May, July, August and September. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and December - expect the least comfortable mix of heat, cold or rain.
What this means for Indiana Dunes National Park
Today is slightly cooler than average for August. The forecast high of 75°F is 3.1°F below the 78°F typical for this month.
A 31% chance means rain is likely somewhere nearby at some point - carry a layer, but do not cancel.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 82°F.
What to pack, what to skip
- Sunglasses, a brimmed hat and SPF 30+
- If your dates are flexible, avoid January, February and December - historically the least comfortable months here.
Summary
Indiana Dunes National Park is a national park in Indiana. Indiana Dunes National Park is a US national park known for Lake Michigan dunes and beaches.
Right now it is 69°F (20°C) in Indiana Dunes National Park with clear. It feels like 66°F. Today runs from 65°F to 75°F. Chance of precipitation is 31%. Sightseeing conditions score 8.6/10 - excellent - go now.
The best time to visit Indiana Dunes National Park is May, July, August and September. The climate is continental. January, February and December tend to be the least comfortable months. July is the warmest month with average highs near 81°F, while January is the coldest with lows near 20°F.
The closest major airport is O'Hare International Airport (ORD), about 49 mi away. Nearby highlights include Starved Rock State Park and Lake Michigan.
In plain terms. Today is slightly cooler than average for August. The forecast high of 75°F is 3.1°F below the 78°F typical for this month. The best window to be outside is roughly 5 PM to 8 PM, when temperature, rain chance and wind line up best. stargazing is the strongest bet in Indiana Dunes National Park today at 8.8/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Indiana Dunes National Park
| Type | National park |
|---|---|
| State | Indiana |
| Country | United States |
| Continent | North America |
| Coordinates | 41°39′11.9″N 87°3′8.6″W (41.6533, -87.0524) |
| Established | 2019 |
| Known for | Lake Michigan dunes and beaches |
| Local time | 4:06 AM (UTC-05:00) |
| Best months | May, July, August and September |
| Climate | Continental |
Weather map for Indiana Dunes National Park
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Explore Indiana Dunes National Park
Every topic we hold for this place, and the same topic for the places around it.
Climate for related places
Frequently asked questions
Where is Indiana Dunes National Park?
Indiana Dunes National Park is a national park in Indiana. Its coordinates are 41.6533, -87.0524. It lies in North America.
What is the weather like in Indiana Dunes National Park right now?
It is currently 69°F (20°C) with clear. Humidity is 64% and wind is 12 mph.
When is the best time to visit Indiana Dunes National Park?
May, July, August and September offer the most comfortable conditions in Indiana Dunes National Park, which has a continental climate. January, February and December are usually the hardest months for outdoor plans.
What time zone is Indiana Dunes National Park in?
Indiana Dunes National Park observes America/Chicago (UTC-05:00). The local time is 4:06 AM.
What is the nearest airport to Indiana Dunes National Park?
The closest airports are O'Hare International Airport (ORD), 49 mi away.
What are the top things to do in Indiana Dunes National Park?
Popular options include Starved Rock State Park and Lake Michigan.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (national-parks) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 23, 2026 at 4:06 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
