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
98°
76°
9
97°
71°
10
79°
64°
11
88°
67°
12
91°
69°
13
93°
70°
14
92°
63°
15
80°
59°
16
77°
60°
17
78°
56°
18
74°
55°
19
73°
55°
20
74°
56°
21
78°
55°
22
83°
61°
23
83°
62°
24
84°
62°
25
83°
61°
26
82°
61°
27
82°
60°
28
81°
62°
29
82°
61°
30
79°
57°
1
77°
51°
2
68°
47°
3
66°
47°
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 66° to 98°, with overnight lows between 47° and 76°. The average high for September is 82° with an average low of 60°. 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.
