S
M
T
W
T
F
S
30
78°
59°
31
79°
58°
1
79°
52°
2
77°
51°
3
78°
51°
4
71°
54°
5
77°
54°
6
78°
56°
7
76°
49°
8
70°
46°
9
68°
51°
10
69°
55°
11
75°
47°
12
74°
55°
13
74°
53°
14
75°
54°
15
74°
55°
16
65°
48°
17
66°
46°
18
67°
43°
19
Hist. Avg.
68°
47°
20
Hist. Avg.
67°
46°
21
Hist. Avg.
67°
46°
22
Hist. Avg.
66°
45°
23
Hist. Avg.
66°
45°
24
Hist. Avg.
66°
44°
25
Hist. Avg.
65°
44°
26
Hist. Avg.
65°
43°
27
Hist. Avg.
64°
43°
28
Hist. Avg.
64°
43°
29
Hist. Avg.
64°
42°
30
Hist. Avg.
63°
42°
1
Hist. Avg.
63°
41°
2
Hist. Avg.
62°
41°
3
Hist. Avg.
62°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Westby
Westby's September 2026 forecast shows daily high temperatures ranging from 65° to 79°, with overnight lows between 43° and 59°. The average high for September is 74° with an average low of 52°. 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 Westby. See also: October | November | December.
