S
M
T
W
T
F
S
26
85°
57°
27
84°
55°
28
86°
55°
29
81°
54°
30
79°
51°
31
86°
56°
1
91°
51°
2
69°
45°
3
66°
44°
4
73°
49°
5
78°
49°
6
77°
50°
7
78°
49°
8
77°
50°
9
71°
47°
10
74°
50°
11
75°
49°
12
74°
52°
13
75°
50°
14
73°
47°
15
69°
51°
16
75°
52°
17
76°
51°
18
77°
50°
19
78°
53°
20
78°
52°
21
76°
51°
22
75°
51°
23
75°
46°
24
72°
46°
25
65°
44°
26
74°
50°
27
75°
50°
28
75°
49°
29
74°
48°
30
64°
49°
31
68°
50°
1
72°
49°
2
66°
48°
3
66°
45°
4
68°
47°
5
73°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Shawnessy
Shawnessy's August 2026 forecast shows daily high temperatures ranging from 64° to 91°, with overnight lows between 44° and 53°. The average high for August is 73° with an average low of 49°. 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 Shawnessy. See also: September | October | November.