S
M
T
W
T
F
S
30
78°
69°
31
91°
73°
1
95°
72°
2
96°
72°
3
94°
70°
4
96°
71°
5
91°
70°
6
84°
60°
7
81°
60°
8
88°
68°
9
80°
58°
10
80°
53°
11
82°
61°
12
80°
58°
13
77°
60°
14
76°
53°
15
72°
52°
16
73°
52°
17
76°
55°
18
72°
54°
19
73°
49°
20
74°
50°
21
74°
56°
22
73°
54°
23
75°
55°
24
77°
54°
25
78°
56°
26
77°
55°
27
77°
56°
28
78°
56°
29
77°
55°
30
75°
55°
1
71°
49°
2
63°
44°
3
63°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Prophetstown
Prophetstown's September 2026 forecast shows daily high temperatures ranging from 63° to 88°, with overnight lows between 40° and 68°. The average high for September is 76° with an average low of 54°. 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 Prophetstown. See also: October | November | December.
