S
M
T
W
T
F
S
30
71°
44°
31
72°
48°
1
78°
45°
2
74°
43°
3
70°
42°
4
71°
44°
5
70°
48°
6
70°
42°
7
73°
48°
8
77°
48°
9
78°
49°
10
77°
49°
11
77°
48°
12
75°
48°
13
76°
48°
14
76°
47°
15
77°
48°
16
76°
39°
17
75°
33°
18
66°
36°
19
61°
36°
20
64°
36°
21
Hist. Avg.
67°
41°
22
Hist. Avg.
66°
41°
23
Hist. Avg.
66°
41°
24
Hist. Avg.
65°
40°
25
Hist. Avg.
65°
40°
26
Hist. Avg.
64°
39°
27
Hist. Avg.
64°
39°
28
Hist. Avg.
64°
39°
29
Hist. Avg.
63°
38°
30
Hist. Avg.
63°
38°
1
Hist. Avg.
62°
38°
2
Hist. Avg.
62°
37°
3
Hist. Avg.
61°
37°
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 61° to 78°, with overnight lows between 33° and 49°. The average high for September is 73° 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 Westby. See also: October | November | December.
