S
M
T
W
T
F
S
30
69°
63°
31
80°
54°
1
76°
63°
2
74°
64°
3
76°
63°
4
77°
59°
5
72°
55°
6
76°
55°
7
77°
55°
8
69°
55°
9
71°
56°
10
76°
57°
11
72°
58°
12
72°
58°
13
70°
54°
14
69°
50°
15
70°
52°
16
72°
58°
17
75°
53°
18
66°
50°
19
67°
47°
20
73°
55°
21
75°
58°
22
76°
58°
23
76°
56°
24
73°
55°
25
72°
53°
26
73°
54°
27
74°
55°
28
74°
53°
29
70°
48°
30
61°
45°
1
60°
44°
2
65°
53°
3
70°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Winooski
Winooski's September 2026 forecast shows daily high temperatures ranging from 60° to 77°, with overnight lows between 44° and 64°. The average high for September is 72° with an average low of 55°. 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 Winooski. See also: October | November | December.
