S
M
T
W
T
F
S
26
84°
67°
27
84°
67°
28
82°
66°
29
81°
65°
30
77°
62°
31
75°
60°
1
75°
61°
2
76°
63°
3
77°
65°
4
79°
65°
5
79°
64°
6
77°
66°
7
79°
65°
8
77°
64°
9
76°
65°
10
76°
56°
11
78°
62°
12
82°
64°
13
83°
65°
14
84°
64°
15
82°
63°
16
80°
64°
17
84°
58°
18
79°
56°
19
74°
55°
20
73°
55°
21
74°
54°
22
74°
54°
23
75°
55°
24
77°
54°
25
79°
55°
26
80°
62°
27
81°
60°
28
78°
55°
29
72°
59°
30
75°
57°
31
76°
55°
1
79°
53°
2
72°
52°
3
71°
54°
4
75°
61°
5
74°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Port Colborne
Port Colborne's August 2026 forecast shows daily high temperatures ranging from 71° to 84°, with overnight lows between 52° and 67°. The average high for August is 78° 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 August weather will actually feel in Port Colborne. See also: September | October | November.
