S
M
T
W
T
F
S
30
66°
51°
31
66°
54°
1
65°
55°
2
68°
53°
3
66°
50°
4
65°
52°
5
65°
54°
6
66°
52°
7
68°
53°
8
66°
52°
9
67°
52°
10
68°
50°
11
64°
53°
12
65°
49°
13
67°
53°
14
67°
52°
15
66°
47°
16
63°
49°
17
64°
47°
18
66°
49°
19
66°
53°
20
65°
53°
21
66°
52°
22
65°
53°
23
63°
50°
24
64°
51°
25
62°
52°
26
61°
50°
27
64°
51°
28
62°
50°
29
64°
48°
30
61°
48°
1
Hist. Avg.
63°
50°
2
Hist. Avg.
63°
50°
3
Hist. Avg.
63°
50°
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 61° to 68°, with overnight lows between 47° and 55°. The average high for September is 65° with an average low of 51°. 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.
