S
M
T
W
T
F
S
30
78°
65°
31
81°
66°
1
81°
66°
2
79°
61°
3
70°
59°
4
70°
58°
5
74°
59°
6
75°
54°
7
73°
62°
8
76°
62°
9
79°
63°
10
79°
54°
11
77°
52°
12
71°
61°
13
79°
62°
14
79°
62°
15
78°
61°
16
78°
62°
17
79°
62°
18
78°
61°
19
78°
60°
20
77°
51°
21
73°
49°
22
66°
58°
23
70°
58°
24
72°
59°
25
75°
53°
26
76°
47°
27
65°
49°
28
63°
47°
29
64°
48°
30
63°
49°
1
64°
53°
2
66°
57°
3
70°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Port Huron
Port Huron's September 2026 forecast shows daily high temperatures ranging from 63° to 81°, with overnight lows between 47° and 66°. The average high for September is 74° with an average low of 57°. 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 Port Huron. See also: October | November | December.
