S
M
T
W
T
F
S
30
73°
54°
31
78°
57°
1
77°
51°
2
77°
49°
3
70°
48°
4
67°
47°
5
67°
48°
6
68°
51°
7
75°
56°
8
77°
56°
9
77°
51°
10
70°
49°
11
70°
49°
12
68°
48°
13
70°
47°
14
67°
44°
15
65°
45°
16
69°
49°
17
71°
48°
18
73°
45°
19
65°
49°
20
67°
41°
21
64°
49°
22
63°
51°
23
71°
52°
24
72°
50°
25
72°
50°
26
64°
51°
27
71°
50°
28
70°
45°
29
67°
49°
30
65°
50°
1
70°
42°
2
70°
38°
3
59°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Wausau
Wausau's September 2026 forecast shows daily high temperatures ranging from 59° to 78°, with overnight lows between 38° and 57°. The average high for September is 70° with an average low of 49°. 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 Wausau. See also: October | November | December.
