S
M
T
W
T
F
S
28
86°
68°
29
90°
70°
30
91°
68°
1
93°
72°
2
95°
70°
3
95°
72°
4
95°
68°
5
93°
66°
6
90°
66°
7
82°
69°
8
83°
68°
9
82°
69°
10
79°
68°
11
76°
65°
12
76°
62°
13
80°
61°
14
81°
66°
15
83°
65°
16
82°
65°
17
79°
66°
18
77°
66°
19
76°
64°
20
79°
63°
21
74°
59°
22
75°
59°
23
75°
60°
24
76°
63°
25
76°
63°
26
77°
65°
27
76°
65°
28
80°
64°
29
79°
65°
30
79°
65°
31
78°
66°
1
77°
65°
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 74° to 83°, with overnight lows between 59° and 69°. The average high for July is 78° with an average low of 64°. 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.