S
M
T
W
T
F
S
28
92°
73°
29
92°
75°
30
93°
74°
1
93°
76°
2
94°
74°
3
94°
75°
4
92°
71°
5
86°
71°
6
84°
70°
7
87°
72°
8
89°
71°
9
90°
70°
10
87°
73°
11
83°
72°
12
86°
71°
13
83°
66°
14
91°
69°
15
92°
72°
16
90°
72°
17
87°
73°
18
89°
70°
19
88°
69°
20
86°
66°
21
84°
65°
22
85°
65°
23
86°
67°
24
86°
66°
25
88°
67°
26
87°
66°
27
88°
71°
28
89°
69°
29
83°
65°
30
82°
69°
31
83°
66°
1
84°
70°
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 82° to 92°, with overnight lows between 65° and 73°. The average high for July is 87° with an average low of 68°. 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.