S
M
T
W
T
F
S
30
82°
66°
31
83°
66°
1
87°
65°
2
83°
62°
3
83°
64°
4
84°
65°
5
85°
64°
6
83°
63°
7
84°
64°
8
89°
65°
9
88°
64°
10
89°
64°
11
87°
63°
12
91°
56°
13
90°
58°
14
87°
62°
15
89°
56°
16
82°
50°
17
75°
51°
18
75°
56°
19
85°
53°
20
74°
58°
21
78°
56°
22
80°
47°
23
74°
47°
24
77°
46°
25
78°
46°
26
79°
52°
27
83°
46°
28
72°
53°
29
77°
52°
30
82°
57°
1
84°
41°
2
85°
39°
3
69°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Marquette
Marquette's September 2026 forecast shows daily high temperatures ranging from 69° to 91°, with overnight lows between 39° and 66°. The average high for September is 82° with an average low of 56°. 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 Marquette. See also: October | November | December.
