S
M
T
W
T
F
S
30
72°
48°
31
77°
53°
1
73°
53°
2
77°
50°
3
78°
53°
4
80°
45°
5
74°
45°
6
73°
44°
7
71°
50°
8
73°
52°
9
74°
45°
10
68°
42°
11
67°
42°
12
66°
44°
13
67°
45°
14
66°
40°
15
64°
39°
16
64°
40°
17
63°
37°
18
63°
39°
19
64°
39°
20
64°
40°
21
67°
41°
22
69°
47°
23
69°
45°
24
70°
47°
25
68°
46°
26
65°
38°
27
62°
37°
28
60°
46°
29
59°
42°
30
64°
43°
1
63°
40°
2
60°
34°
3
57°
40°
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 57° to 80°, with overnight lows between 34° and 53°. The average high for September is 68° with an average low of 44°. 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.
