S
M
T
W
T
F
S
26
58°
28°
27
48°
36°
28
47°
29°
29
41°
28°
30
46°
29°
1
54°
27°
2
65°
36°
3
72°
34°
4
51°
32°
5
38°
29°
6
43°
31°
7
54°
23°
8
62°
35°
9
54°
33°
10
52°
28°
11
67°
30°
12
61°
42°
13
73°
38°
14
78°
53°
15
78°
56°
16
56°
40°
17
55°
37°
18
49°
41°
19
46°
32°
20
63°
44°
21
68°
45°
22
69°
47°
23
59°
48°
24
75°
54°
25
80°
58°
26
80°
56°
27
77°
55°
28
74°
54°
29
80°
58°
30
74°
56°
31
71°
52°
1
72°
49°
2
66°
53°
3
71°
51°
4
72°
54°
5
74°
55°
6
68°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Plummer
Plummer's May 2026 forecast shows daily high temperatures ranging from 46° to 80°, with overnight lows between 32° and 58°. The average high for May is 70° 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 May weather will actually feel in Plummer. See also: June | July | August.