S
M
T
W
T
F
S
26
79°
65°
27
80°
61°
28
83°
64°
29
84°
61°
30
82°
58°
31
84°
60°
1
83°
58°
2
80°
59°
3
79°
58°
4
78°
56°
5
79°
57°
6
79°
57°
7
80°
58°
8
82°
62°
9
81°
60°
10
78°
59°
11
81°
64°
12
84°
65°
13
81°
62°
14
85°
56°
15
78°
55°
16
77°
61°
17
78°
63°
18
78°
56°
19
77°
55°
20
76°
63°
21
78°
63°
22
83°
61°
23
84°
62°
24
83°
61°
25
84°
54°
26
81°
56°
27
75°
59°
28
76°
59°
29
78°
61°
30
81°
62°
31
83°
60°
1
83°
54°
2
80°
56°
3
81°
55°
4
74°
56°
5
78°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Sumner
Sumner's August 2026 forecast shows daily high temperatures ranging from 74° to 85°, with overnight lows between 54° and 65°. The average high for August is 80° with an average low of 59°. 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 Sumner. See also: September | October | November.
