S
M
T
W
T
F
S
30
78°
64°
31
83°
59°
1
79°
53°
2
81°
57°
3
84°
63°
4
83°
61°
5
82°
63°
6
78°
67°
7
78°
68°
8
84°
59°
9
73°
52°
10
69°
53°
11
74°
56°
12
78°
55°
13
78°
58°
14
73°
55°
15
75°
53°
16
73°
53°
17
70°
46°
18
74°
51°
19
73°
51°
20
74°
50°
21
68°
50°
22
70°
49°
23
72°
51°
24
73°
50°
25
71°
45°
26
60°
39°
27
59°
37°
28
57°
37°
29
68°
38°
30
58°
37°
1
57°
43°
2
56°
42°
3
57°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Brainerd
Brainerd's September 2026 forecast shows daily high temperatures ranging from 56° to 84°, with overnight lows between 37° and 68°. The average high for September is 71° with an average low of 50°. 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 Brainerd. See also: October | November | December.
