Late summer · Weather & things to do
Indiana Dunes in August
Little changes in Indiana Dunes from July: highs stay near 82°F (28°C), lows near 64°F (18°C), and about 4.3 in (108 mm) of rain falls.
It scores 81/100 for comfort, 2nd of 12, which makes it a solid shoulder-season month.
- Avg high
- 82°F (28°C)
- Avg low
- 64°F (18°C)
- Rain
- 4.3 in (108 mm)
- Humidity
- 72%
- Cloud cover
- 48%
- Daylight
- ~13 h 41 min
- Comfort score
- 81/100 · Great
What August feels like
Days are warm, averaging 82°F (28°C), easy weather for being outside from morning to evening.
Nights cool to an average low of 64°F (18°C).
Showers are part of the month, adding up to about 4.3 in (108 mm).
Plan around August
August is shoulder season: good weather, a step below the best months (September).
- Comfort holds steady from July (79 → 81/100).
- August sits inside the May – Oct window our Indiana & Ohio City-Nature Loop recommends.
What to pack for August
- Light, breathable clothes82°F afternoons
- Sunscreen, sunglasses and a hathigh UV on clear days
- Packable rain jacket or umbrellaabout 4.3 in of rain
- Comfortable walking shoesmost picks involve some walking
What to do in Indiana Dunes in August
August is good outdoor weather here, so these picks lean toward the open air.
West Beach
Lifeguarded national park beach with views of the Chicago skyline across Lake Michigan.
Why now Our curated notes say it's best summer afternoon.
Indiana Dunes Visitor Center
Joint national and state park visitor center for maps, passes and trail conditions.
Why now August scores 81/100 for comfort, good conditions for being outside.
Dune Succession Trail
Boardwalk and stair climb showing beach-to-forest dune stages, starting at West Beach.
Why now Highs near 82°F and 4.3 in of monthly rain make this an easy outdoor pick.
Wagner's Ribs
Porter rib house known for slabs of barbecue ribs since the 1970s.
3 Dune Challenge
1.5-mile climb over the state park's three tallest dunes, 552 vertical feet in sand.
Why now One to do outside while the weather is on your side.
Nearby in August
- Chicago in August~34 mi · highs 77°F, 4.1 in rain · 3°C (5°F) cooler by day, about as wet
- Holland in August~92 mi · highs 76°F, 3.4 in rain · 4°C (6°F) cooler by day, drier
- Milwaukee in August~105 mi · highs 81°F, 3.9 in rain · similar daytime temperatures, about as wet
- Broad Ripple in August~132 mi · highs 83°F, 3.7 in rain · similar daytime temperatures, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Indiana Dunes in August: quick answers
Is August a good time to visit Indiana Dunes?
It's a good shoulder-season choice, scoring 81/100 against a best of 88 in September. Expect highs of 82°F (28°C) and 4.3 in (108 mm) of rain. August is inside the May – Oct window our Indiana & Ohio City-Nature Loop recommends.
How hot is Indiana Dunes in August?
Average highs are 82°F (28°C) and average lows 64°F (18°C), making it the 2nd-warmest month by daytime highs.
Does it rain a lot in Indiana Dunes in August?
Some: about 4.3 in (108 mm) of rain falls across August on average, the 2nd-wettest month of the year. The annual total is about 38.7 in (984 mm).
What should I pack for Indiana Dunes in August?
Bring light, breathable clothes (82°F afternoons), sunscreen, sunglasses and a hat (high UV on clear days), packable rain jacket or umbrella (about 4.3 in of rain) and comfortable walking shoes (most picks involve some walking).
More on Indiana Dunes
Routes in season in August
- Indiana & Ohio City-Nature Loop May – Oct
Planning Indiana Dunes in August?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.