S
M
T
W
T
F
S
30
79°
64°
31
87°
70°
1
88°
70°
2
84°
66°
3
82°
70°
4
81°
67°
5
82°
64°
6
79°
62°
7
79°
60°
8
79°
67°
9
83°
53°
10
75°
54°
11
79°
63°
12
76°
52°
13
68°
54°
14
65°
52°
15
66°
46°
16
67°
48°
17
63°
45°
18
65°
44°
19
65°
44°
20
64°
46°
21
68°
46°
22
69°
51°
23
71°
52°
24
72°
52°
25
71°
51°
26
70°
51°
27
71°
52°
28
72°
52°
29
70°
51°
30
69°
50°
1
68°
44°
2
57°
41°
3
56°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Westby
Westby's September 2026 forecast shows daily high temperatures ranging from 56° to 83°, with overnight lows between 37° and 67°. The average high for September is 69° with an average low of 50°. 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.
