S
M
T
W
T
F
S
26
85°
63°
27
84°
62°
28
83°
63°
29
85°
64°
30
86°
60°
31
78°
58°
1
77°
57°
2
85°
63°
3
76°
52°
4
76°
59°
5
80°
57°
6
78°
56°
7
82°
55°
8
85°
59°
9
82°
61°
10
85°
58°
11
82°
53°
12
76°
51°
13
76°
50°
14
77°
57°
15
77°
56°
16
76°
52°
17
75°
51°
18
78°
58°
19
81°
60°
20
82°
61°
21
84°
60°
22
84°
61°
23
83°
57°
24
85°
54°
25
78°
51°
26
75°
52°
27
74°
57°
28
82°
49°
29
74°
48°
30
72°
46°
31
73°
54°
1
73°
46°
2
77°
50°
3
74°
47°
4
71°
45°
5
71°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Casselton
Casselton's August 2026 forecast shows daily high temperatures ranging from 71° to 86°, with overnight lows between 45° and 64°. The average high for August is 79° with an average low of 55°. 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 Casselton. See also: September | October | November.
