S
M
T
W
T
F
S
30
80°
63°
31
87°
67°
1
90°
62°
2
85°
62°
3
76°
68°
4
87°
68°
5
77°
62°
6
79°
60°
7
78°
57°
8
76°
61°
9
81°
54°
10
74°
48°
11
80°
51°
12
73°
46°
13
66°
39°
14
63°
55°
15
71°
49°
16
66°
52°
17
71°
52°
18
69°
52°
19
71°
50°
20
70°
49°
21
64°
46°
22
66°
52°
23
67°
46°
24
69°
50°
25
68°
45°
26
71°
53°
27
71°
52°
28
66°
50°
29
65°
51°
30
67°
50°
1
69°
48°
2
67°
46°
3
65°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Marshfield
Marshfield's September 2026 forecast shows daily high temperatures ranging from 63° to 73°, with overnight lows between 39° and 55°. The average high for September is 68° with an average low of 49°. 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 Marshfield. See also: October | November | December.
