S
M
T
W
T
F
S
30
75°
55°
31
76°
58°
1
63°
58°
2
68°
59°
3
71°
58°
4
72°
54°
5
65°
51°
6
68°
51°
7
69°
50°
8
66°
49°
9
67°
48°
10
67°
51°
11
66°
50°
12
69°
51°
13
66°
47°
14
64°
46°
15
64°
43°
16
67°
49°
17
70°
45°
18
62°
41°
19
62°
39°
20
68°
46°
21
70°
49°
22
71°
49°
23
71°
47°
24
69°
46°
25
69°
44°
26
70°
46°
27
69°
47°
28
69°
45°
29
66°
40°
30
57°
36°
1
57°
36°
2
61°
44°
3
66°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Killington
Killington's September 2026 forecast shows daily high temperatures ranging from 57° to 72°, with overnight lows between 36° and 59°. The average high for September is 67° with an average low of 47°. 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 Killington. See also: October | November | December.