S
M
T
W
T
F
S
26
98°
68°
27
94°
72°
28
88°
65°
29
93°
66°
30
91°
69°
31
75°
65°
1
86°
61°
2
83°
58°
3
87°
64°
4
77°
57°
5
81°
48°
6
84°
54°
7
75°
55°
8
84°
48°
9
81°
60°
10
84°
58°
11
86°
62°
12
87°
62°
13
76°
65°
14
83°
59°
15
80°
67°
16
79°
59°
17
85°
59°
18
76°
50°
19
78°
53°
20
83°
60°
21
84°
55°
22
78°
54°
23
77°
60°
24
79°
62°
25
84°
59°
26
83°
60°
27
81°
58°
28
78°
57°
29
80°
59°
30
77°
55°
31
69°
54°
1
69°
54°
2
70°
53°
3
70°
51°
4
71°
56°
5
73°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Isanti
Isanti's August 2026 forecast shows daily high temperatures ranging from 69° to 85°, with overnight lows between 50° and 62°. The average high for August is 77° with an average low of 56°. 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 Isanti. See also: September | October | November.