S
M
T
W
T
F
S
30
N/A
31
74°
63°
1
68°
62°
2
72°
63°
3
76°
61°
4
75°
61°
5
74°
59°
6
74°
61°
7
78°
61°
8
77°
63°
9
77°
62°
10
78°
61°
11
79°
57°
12
73°
56°
13
73°
56°
14
78°
57°
15
71°
57°
16
73°
59°
17
77°
57°
18
69°
54°
19
70°
56°
20
71°
57°
21
75°
58°
22
77°
59°
23
77°
57°
24
76°
56°
25
75°
55°
26
75°
56°
27
76°
57°
28
75°
55°
29
74°
54°
30
67°
50°
1
65°
50°
2
65°
53°
3
72°
54°
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 65° to 79°, with overnight lows between 50° and 63°. The average high for September is 74° with an average low of 58°. 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.
