S
M
T
W
T
F
S
30
78°
59°
31
76°
56°
1
74°
62°
2
74°
58°
3
75°
53°
4
73°
58°
5
73°
63°
6
80°
61°
7
82°
62°
8
81°
60°
9
80°
55°
10
73°
58°
11
73°
58°
12
78°
52°
13
Hist. Avg.
75°
54°
14
Hist. Avg.
75°
54°
15
Hist. Avg.
74°
53°
16
Hist. Avg.
74°
53°
17
Hist. Avg.
74°
52°
18
Hist. Avg.
73°
52°
19
Hist. Avg.
73°
52°
20
Hist. Avg.
72°
51°
21
Hist. Avg.
72°
51°
22
Hist. Avg.
71°
50°
23
Hist. Avg.
71°
50°
24
Hist. Avg.
70°
49°
25
Hist. Avg.
70°
49°
26
Hist. Avg.
70°
48°
27
Hist. Avg.
69°
48°
28
Hist. Avg.
68°
48°
29
Hist. Avg.
68°
47°
30
Hist. Avg.
68°
47°
1
Hist. Avg.
67°
46°
2
Hist. Avg.
67°
46°
3
Hist. Avg.
66°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Whitefish Bay
Whitefish Bay's September 2026 forecast shows daily high temperatures ranging from 73° to 82°, with overnight lows between 52° and 63°. The average high for September is 76° with an average low of 58°. 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 Whitefish Bay. See also: October | November | December.
