S
M
T
W
T
F
S
31
72°
43°
1
77°
45°
2
79°
46°
3
81°
48°
4
64°
46°
5
72°
43°
6
63°
45°
7
66°
37°
8
68°
39°
9
73°
39°
10
77°
45°
11
75°
46°
12
79°
46°
13
79°
54°
14
81°
48°
15
81°
52°
16
77°
46°
17
81°
48°
18
82°
50°
19
72°
54°
20
77°
52°
21
75°
54°
22
73°
61°
23
75°
59°
24
70°
61°
25
72°
55°
26
79°
50°
27
82°
54°
28
73°
45°
29
79°
41°
30
75°
45°
1
70°
50°
2
77°
41°
3
82°
41°
4
86°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Algonac
Algonac's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Algonac. See also: October | November | December.