S
M
T
W
T
F
S
28
80°
67°
29
84°
68°
30
85°
69°
1
85°
68°
2
84°
68°
3
82°
67°
4
82°
69°
5
80°
65°
6
80°
62°
7
78°
68°
8
80°
68°
9
81°
64°
10
80°
64°
11
81°
62°
12
80°
61°
13
79°
60°
14
81°
61°
15
83°
65°
16
84°
62°
17
83°
62°
18
85°
60°
19
Hist. Avg.
83°
63°
20
Hist. Avg.
83°
63°
21
Hist. Avg.
83°
63°
22
Hist. Avg.
83°
63°
23
Hist. Avg.
83°
63°
24
Hist. Avg.
82°
63°
25
Hist. Avg.
82°
63°
26
Hist. Avg.
82°
63°
27
Hist. Avg.
82°
63°
28
Hist. Avg.
82°
63°
29
Hist. Avg.
82°
63°
30
Hist. Avg.
82°
63°
31
Hist. Avg.
82°
63°
1
Hist. Avg.
82°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
July Weather in Indiana Dunes State Park
Indiana Dunes State Park's July 2026 forecast shows daily high temperatures ranging from 78° to 85°, with overnight lows between 60° and 69°. The average high for July is 82° with an average low of 65°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Indiana Dunes State Park. See also: August | September | October.
