S
M
T
W
T
F
S
28
77°
55°
29
82°
61°
30
86°
66°
1
88°
70°
2
88°
70°
3
86°
72°
4
79°
61°
5
77°
59°
6
72°
59°
7
73°
63°
8
81°
61°
9
79°
61°
10
77°
63°
11
77°
59°
12
79°
55°
13
81°
61°
14
94°
71°
15
91°
63°
16
85°
60°
17
82°
59°
18
81°
63°
19
78°
59°
20
78°
59°
21
77°
58°
22
71°
57°
23
73°
56°
24
76°
60°
25
76°
60°
26
78°
57°
27
75°
58°
28
79°
58°
29
76°
56°
30
76°
60°
31
77°
60°
1
78°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Vandalia
Vandalia's July 2026 forecast shows daily high temperatures ranging from 71° to 94°, with overnight lows between 56° and 71°. The average high for July is 79° with an average low of 60°. 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 Vandalia. See also: August | September | October.