Late spring · Weather & things to do
Indiana Dunes in May
The year's rain peaks now, with about 4.4 in (111 mm) falling in Indiana Dunes, alongside highs near 69°F (20°C) and lows of 50°F (10°C).
It scores 80/100 for comfort, 3rd of 12, which makes it a solid shoulder-season month.
- Avg high
- 69°F (20°C)
- Avg low
- 50°F (10°C)
- Rain
- 4.4 in (111 mm)
- Humidity
- 78%
- Cloud cover
- 64%
- Daylight
- ~14 h 21 min
- Comfort score
- 80/100 · Great
What May feels like
Highs near 69°F (20°C) make for comfortable sightseeing weather.
Nights cool to an average low of 50°F (10°C).
Some rain is likely, about 4.4 in (111 mm) in the month, so pack for a shower or two.
Plan around May
May is shoulder season: good weather, a step below the best months (September).
- Start of the wettest three-month stretch (May – July), which brings about 12.2 in (310 mm) in total.
- Comfort improves from 73/100 in April to 80/100.
- May sits inside the May – Oct window our Indiana & Ohio City-Nature Loop recommends.
What to pack for May
- A warm layer for eveningsnights drop to 50°F
- Packable rain jacket or umbrellaa shower or two is likely
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in Indiana Dunes in May
With conditions on your side, the picks below favor time outside.
Great Marsh Trail
Flat loop through restored wetlands, good for birding.
Why now Our curated notes say it's best spring migration.
Indiana Dunes Visitor Center
Joint national and state park visitor center for maps, passes and trail conditions.
Why now May scores 80/100 for comfort, good conditions for being outside.
Chellberg Farm and Bailly Homestead
Restored 1880s Swedish farmstead and fur-trader homestead linked by trails.
Shoreline Brewery
Michigan City brewpub with house beers and pub food near the lakefront.
Dune Succession Trail
Boardwalk and stair climb showing beach-to-forest dune stages, starting at West Beach.
Why now Highs near 69°F and 4.4 in of monthly rain make this an easy outdoor pick.
Nearby in May
- Chicago in May~34 mi · highs 59°F, 4.6 in rain · 5°C (10°F) cooler by day, about as wet
- Holland in May~92 mi · highs 58°F, 4.1 in rain · 6°C (10°F) cooler by day, about as wet
- Milwaukee in May~105 mi · highs 66°F, 4.3 in rain · 1°C (2°F) cooler by day, about as wet
- Broad Ripple in May~132 mi · highs 73°F, 4.7 in rain · 2°C (4°F) warmer by day, 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 May: quick answers
Is May a good time to visit Indiana Dunes?
It's a good shoulder-season choice, scoring 80/100 against a best of 88 in September. Expect highs of 69°F (20°C) and 4.4 in (111 mm) of rain. May is inside the May – Oct window our Indiana & Ohio City-Nature Loop recommends.
How hot is Indiana Dunes in May?
Average highs are 69°F (20°C) and average lows 50°F (10°C), making it the 5th-warmest month by daytime highs.
Does it rain a lot in Indiana Dunes in May?
Some: about 4.4 in (111 mm) of rain falls across May on average, the wettest month of the year. The annual total is about 38.7 in (984 mm).
What should I pack for Indiana Dunes in May?
Bring a warm layer for evenings (nights drop to 50°F), packable rain jacket or umbrella (a shower or two is likely) and comfortable walking shoes (most places below are best reached on foot or with short walks).
More on Indiana Dunes
Routes in season in May
- Indiana & Ohio City-Nature Loop May – Oct
Planning Indiana Dunes in May?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.