S
M
T
W
T
F
S
26
65°
48°
27
79°
41°
28
77°
54°
29
69°
49°
30
58°
38°
1
58°
33°
2
56°
30°
3
63°
28°
4
74°
48°
5
74°
59°
6
64°
49°
7
62°
37°
8
72°
35°
9
72°
52°
10
71°
52°
11
69°
47°
12
73°
39°
13
74°
48°
14
62°
41°
15
71°
34°
16
73°
46°
17
86°
61°
18
89°
57°
19
89°
67°
20
77°
56°
21
65°
50°
22
66°
55°
23
78°
60°
24
72°
62°
25
76°
56°
26
81°
63°
27
76°
63°
28
81°
52°
29
75°
51°
30
72°
49°
31
74°
53°
1
75°
54°
2
79°
56°
3
77°
57°
4
78°
59°
5
79°
58°
6
80°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in New Marshfield
New Marshfield's May 2026 forecast shows daily high temperatures ranging from 72° to 81°, with overnight lows between 49° and 63°. The average high for May is 77° with an average low of 56°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in New Marshfield. See also: June | July | August.