Indiana Dunes National Park in July

Indiana Dunes National Park · crowd + weather almanac

July crowd level busiest stretch

about 436,000 visits in a typical July

The busiest month of the year · median of 2016–2025 official NPS counts

July is the busiest month of the year at Indiana Dunes National Park: about 436,000 recreation visits in a typical July (18% of the year's traffic). This is high season — the park is at or near its busiest. Weather-wise, July days at the Indiana Dunes Nl, IN station typically top out around 82°F with nights near 64°F, and about 4.0 inches of precipitation falls over the month.

Typical July: 436,351 recreation visits (median 2016–2025); the range across those years ran 308,792 (2016) to 594,272 (2021).
Busier than 11 of the other 11 months.
1991–2020 July normals at Indiana Dunes Nl, IN: high 82°F, low 64°F, 3.98 in precipitation, 0.0 in snow.
Similar daytime temperatures, thinner crowds: September typically runs 74°F days with about 44% fewer visits (243,000 vs 436,000).

Typical (median) monthly recreation visits at Indiana Dunes National Park, 2016–2025. July highlighted. Source: NPS Visitor Use Statistics.

July weather (1991–2020 normals)

Typical daytime high	82°F
Typical overnight low	64°F
Precipitation (monthly normal)	3.98 in
Snowfall (monthly normal)	0.0 in
Measured at	Indiana Dunes Nl, IN (USC00124244), 2.4 mi from the park reference point, elev. 680 ft

Every month at Indiana Dunes

Month	Typical visits	Crowds	High / Low	Precip
January	71,142	quiet	32°F / 18°F	2.2 in
February	85,577	quiet	36°F / 21°F	2.0 in
March	124,061	quiet	46°F / 30°F	2.3 in
April	122,599	quiet	57°F / 40°F	3.5 in
May	204,925	moderate	68°F / 50°F	4.3 in
June	330,558	busy	78°F / 60°F	4.3 in
July	436,351	busiest stretch	82°F / 64°F	4.0 in
August	397,679	busiest stretch	80°F / 63°F	4.1 in
September	242,939	moderate	74°F / 56°F	3.6 in
October	184,907	moderate	62°F / 45°F	3.8 in
November	95,411	quiet	49°F / 34°F	2.8 in
December	88,593	quiet	37°F / 24°F	2.3 in

Official NPS page for Indiana Dunes →