S
M
T
W
T
F
S
30
82°
67°
31
87°
66°
1
90°
68°
2
87°
68°
3
88°
71°
4
91°
70°
5
87°
70°
6
77°
66°
7
77°
66°
8
76°
66°
9
84°
60°
10
81°
53°
11
83°
55°
12
74°
55°
13
66°
49°
14
71°
55°
15
69°
54°
16
69°
61°
17
73°
63°
18
81°
65°
19
74°
59°
20
71°
56°
21
67°
53°
22
70°
52°
23
71°
51°
24
73°
50°
25
73°
52°
26
74°
52°
27
73°
50°
28
71°
44°
29
72°
51°
30
71°
49°
1
73°
50°
2
69°
49°
3
73°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Webster City
Webster City's September 2026 forecast shows daily high temperatures ranging from 67° to 81°, with overnight lows between 44° and 65°. The average high for September is 72° with an average low of 53°. 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 Webster City. See also: October | November | December.
