S
M
T
W
T
F
S
28
64°
50°
29
66°
50°
30
64°
50°
1
64°
50°
2
63°
50°
3
64°
52°
4
66°
50°
5
63°
50°
6
59°
50°
7
55°
50°
8
65°
53°
9
61°
53°
10
64°
54°
11
65°
54°
12
71°
52°
13
72°
47°
14
85°
50°
15
71°
51°
16
70°
52°
17
69°
53°
18
70°
51°
19
63°
50°
20
60°
52°
21
62°
51°
22
61°
50°
23
62°
49°
24
60°
50°
25
61°
50°
26
60°
49°
27
65°
52°
28
67°
55°
29
66°
54°
30
64°
53°
31
62°
52°
1
64°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Petrolia
Petrolia's July 2026 forecast shows daily high temperatures ranging from 60° to 85°, with overnight lows between 49° and 55°. The average high for July is 65° with an average low of 52°. 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 Petrolia. See also: August | September | October.