S
M
T
W
T
F
S
30
72°
52°
31
72°
53°
1
73°
50°
2
72°
55°
3
74°
50°
4
73°
52°
5
72°
54°
6
71°
50°
7
72°
48°
8
76°
54°
9
73°
48°
10
73°
47°
11
72°
54°
12
72°
51°
13
70°
45°
14
68°
55°
15
71°
56°
16
77°
52°
17
75°
44°
18
69°
43°
19
64°
42°
20
63°
44°
21
64°
42°
22
68°
47°
23
66°
44°
24
64°
42°
25
65°
41°
26
64°
42°
27
64°
42°
28
63°
41°
29
60°
40°
30
61°
47°
1
62°
41°
2
Hist. Avg.
63°
41°
3
Hist. Avg.
62°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Isanti
Isanti's September 2026 forecast shows daily high temperatures ranging from 60° to 77°, with overnight lows between 40° and 56°. The average high for September is 69° with an average low of 48°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Isanti. See also: October | November | December.
