S
M
T
W
T
F
S
26
86°
67°
27
79°
64°
28
77°
59°
29
77°
65°
30
78°
64°
31
79°
66°
1
78°
65°
2
83°
66°
3
84°
62°
4
77°
62°
5
77°
65°
6
81°
64°
7
76°
63°
8
76°
61°
9
75°
58°
10
76°
60°
11
77°
64°
12
82°
64°
13
78°
62°
14
76°
60°
15
79°
64°
16
76°
64°
17
80°
63°
18
82°
64°
19
83°
64°
20
83°
61°
21
76°
60°
22
78°
63°
23
84°
62°
24
84°
62°
25
84°
57°
26
83°
51°
27
74°
49°
28
73°
51°
29
74°
55°
30
82°
59°
31
82°
48°
1
81°
49°
2
71°
47°
3
69°
46°
4
69°
48°
5
70°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Sisseton
Sisseton's August 2026 forecast shows daily high temperatures ranging from 69° to 86°, with overnight lows between 46° and 67°. The average high for August is 78° 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 Sisseton. See also: September | October | November.
