S
M
T
W
T
F
S
30
99°
71°
31
100°
73°
1
98°
75°
2
99°
77°
3
99°
76°
4
99°
74°
5
101°
75°
6
101°
73°
7
97°
76°
8
100°
74°
9
101°
75°
10
82°
70°
11
90°
67°
12
87°
68°
13
94°
68°
14
97°
74°
15
100°
76°
16
97°
76°
17
96°
72°
18
96°
72°
19
95°
72°
20
90°
67°
21
83°
60°
22
81°
62°
23
84°
60°
24
79°
58°
25
81°
59°
26
81°
61°
27
84°
63°
28
84°
61°
29
75°
52°
30
80°
60°
1
80°
60°
2
75°
59°
3
74°
58°
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 74° to 97°, with overnight lows between 52° and 76°. The average high for September is 84° with an average low of 63°. 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.
