S
M
T
W
T
F
S
26
84°
57°
27
83°
62°
28
74°
63°
29
71°
60°
30
75°
57°
31
81°
58°
1
85°
62°
2
81°
62°
3
80°
61°
4
84°
61°
5
85°
62°
6
83°
62°
7
83°
63°
8
81°
58°
9
82°
62°
10
83°
62°
11
81°
62°
12
81°
61°
13
80°
62°
14
79°
61°
15
76°
57°
16
78°
61°
17
79°
61°
18
79°
60°
19
78°
60°
20
77°
59°
21
78°
59°
22
78°
60°
23
79°
58°
24
81°
52°
25
72°
53°
26
73°
59°
27
75°
60°
28
80°
60°
29
80°
59°
30
76°
51°
31
72°
50°
1
71°
50°
2
70°
51°
3
70°
49°
4
71°
52°
5
76°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fort Plain
Fort Plain's August 2026 forecast shows daily high temperatures ranging from 70° to 85°, with overnight lows between 49° and 63°. 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 Fort Plain. See also: September | October | November.