S
M
T
W
T
F
S
30
80°
48°
31
79°
43°
1
72°
42°
2
71°
44°
3
71°
42°
4
72°
43°
5
71°
42°
6
70°
41°
7
71°
42°
8
74°
45°
9
72°
47°
10
68°
42°
11
69°
44°
12
72°
43°
13
73°
46°
14
74°
45°
15
67°
41°
16
67°
41°
17
65°
40°
18
67°
44°
19
65°
38°
20
72°
45°
21
66°
45°
22
Hist. Avg.
66°
44°
23
Hist. Avg.
66°
44°
24
Hist. Avg.
65°
43°
25
Hist. Avg.
65°
43°
26
Hist. Avg.
64°
43°
27
Hist. Avg.
64°
42°
28
Hist. Avg.
63°
42°
29
Hist. Avg.
63°
42°
30
Hist. Avg.
62°
41°
1
Hist. Avg.
62°
41°
2
Hist. Avg.
61°
40°
3
Hist. Avg.
61°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Marshfield
Marshfield's September 2026 forecast shows daily high temperatures ranging from 65° to 80°, with overnight lows between 38° and 48°. The average high for September is 71° with an average low of 43°. 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.
