S
M
T
W
T
F
S
30
79°
60°
31
79°
59°
1
78°
58°
2
73°
51°
3
69°
51°
4
78°
59°
5
79°
59°
6
79°
58°
7
78°
58°
8
79°
57°
9
77°
58°
10
76°
57°
11
68°
55°
12
71°
48°
13
68°
49°
14
72°
50°
15
68°
44°
16
65°
43°
17
64°
44°
18
63°
40°
19
63°
41°
20
64°
44°
21
65°
42°
22
68°
51°
23
72°
52°
24
72°
50°
25
73°
49°
26
73°
50°
27
74°
39°
28
64°
48°
29
66°
38°
30
61°
48°
1
69°
36°
2
69°
36°
3
56°
34°
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 56° to 79°, with overnight lows between 34° and 60°. The average high for September is 71° 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.
