S
M
T
W
T
F
S
26
79°
57°
27
79°
57°
28
81°
58°
29
80°
56°
30
79°
55°
31
76°
48°
1
69°
53°
2
70°
54°
3
70°
53°
4
71°
56°
5
76°
57°
6
78°
57°
7
80°
56°
8
79°
57°
9
78°
53°
10
77°
54°
11
75°
54°
12
76°
52°
13
72°
48°
14
69°
51°
15
75°
54°
16
77°
55°
17
78°
52°
18
77°
54°
19
77°
54°
20
76°
49°
21
72°
46°
22
66°
45°
23
65°
47°
24
67°
48°
25
73°
50°
26
74°
44°
27
70°
43°
28
65°
42°
29
63°
42°
30
64°
44°
31
65°
44°
1
69°
49°
2
65°
48°
3
64°
47°
4
63°
41°
5
62°
42°
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 62° to 81°, with overnight lows between 41° and 58°. The average high for August is 72° with an average low of 51°. 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.
