S
M
T
W
T
F
S
26
77°
57°
27
77°
58°
28
76°
56°
29
76°
58°
30
77°
58°
31
78°
59°
1
78°
66°
2
79°
58°
3
80°
59°
4
81°
58°
5
81°
63°
6
83°
66°
7
85°
66°
8
85°
65°
9
79°
59°
10
81°
57°
11
76°
56°
12
77°
55°
13
76°
58°
14
77°
64°
15
77°
57°
16
84°
66°
17
84°
57°
18
78°
60°
19
Hist. Avg.
79°
60°
20
Hist. Avg.
79°
59°
21
Hist. Avg.
79°
59°
22
Hist. Avg.
78°
59°
23
Hist. Avg.
78°
59°
24
Hist. Avg.
78°
59°
25
Hist. Avg.
78°
58°
26
Hist. Avg.
78°
58°
27
Hist. Avg.
78°
58°
28
Hist. Avg.
77°
58°
29
Hist. Avg.
77°
58°
30
Hist. Avg.
77°
57°
31
Hist. Avg.
77°
57°
1
Hist. Avg.
76°
57°
2
Hist. Avg.
76°
56°
3
Hist. Avg.
76°
56°
4
Hist. Avg.
76°
56°
5
Hist. Avg.
75°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Minnetonka
Minnetonka's August 2026 forecast shows daily high temperatures ranging from 76° to 85°, with overnight lows between 55° and 66°. The average high for August is 79° with an average low of 60°. 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 Minnetonka. See also: September | October | November.