S
M
T
W
T
F
S
30
70°
63°
31
83°
61°
1
90°
54°
2
83°
60°
3
76°
59°
4
73°
64°
5
81°
58°
6
81°
54°
7
79°
60°
8
71°
62°
9
77°
48°
10
72°
50°
11
75°
55°
12
71°
47°
13
65°
48°
14
63°
46°
15
62°
45°
16
66°
47°
17
65°
50°
18
65°
45°
19
63°
46°
20
67°
37°
21
63°
48°
22
67°
49°
23
70°
49°
24
70°
48°
25
69°
48°
26
66°
47°
27
69°
49°
28
70°
50°
29
67°
49°
30
67°
49°
1
65°
45°
2
61°
41°
3
56°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rhinelander
Rhinelander's September 2026 forecast shows daily high temperatures ranging from 56° to 79°, with overnight lows between 37° and 62°. The average high for September is 67° 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 Rhinelander. See also: October | November | December.
