S
M
T
W
T
F
S
26
72°
59°
27
74°
57°
28
73°
61°
29
77°
59°
30
78°
60°
31
78°
56°
1
78°
58°
2
76°
61°
3
79°
60°
4
73°
55°
5
75°
58°
6
73°
60°
7
75°
60°
8
78°
58°
9
76°
55°
10
72°
60°
11
78°
55°
12
78°
53°
13
72°
60°
14
76°
61°
15
78°
59°
16
75°
53°
17
75°
53°
18
70°
52°
19
70°
54°
20
72°
56°
21
70°
52°
22
70°
56°
23
74°
57°
24
75°
54°
25
73°
51°
26
71°
49°
27
67°
49°
28
67°
50°
29
66°
51°
30
67°
54°
31
71°
57°
1
74°
57°
2
74°
56°
3
73°
54°
4
73°
55°
5
72°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Summerside
Summerside's August 2026 forecast shows daily high temperatures ranging from 66° to 79°, with overnight lows between 49° and 61°. The average high for August is 74° with an average low of 56°. 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 Summerside. See also: September | October | November.
