S
M
T
W
T
F
S
26
92°
73°
27
93°
72°
28
84°
69°
29
83°
66°
30
82°
63°
31
69°
62°
1
80°
61°
2
78°
61°
3
80°
60°
4
78°
64°
5
75°
60°
6
78°
62°
7
81°
66°
8
80°
65°
9
82°
61°
10
81°
61°
11
77°
64°
12
79°
60°
13
77°
61°
14
81°
60°
15
76°
62°
16
83°
65°
17
85°
66°
18
86°
65°
19
85°
64°
20
83°
64°
21
84°
65°
22
85°
65°
23
84°
64°
24
83°
64°
25
80°
62°
26
75°
60°
27
76°
59°
28
81°
62°
29
82°
62°
30
83°
62°
31
83°
62°
1
84°
61°
2
83°
62°
3
84°
62°
4
83°
61°
5
83°
61°
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 75° to 86°, with overnight lows between 59° and 66°. The average high for August is 81° with an average low of 62°. 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.
