S
M
T
W
T
F
S
26
66°
36°
27
67°
41°
28
69°
38°
29
61°
40°
30
61°
44°
1
49°
36°
2
48°
34°
3
47°
33°
4
50°
32°
5
51°
33°
6
54°
36°
7
53°
34°
8
55°
35°
9
53°
36°
10
55°
35°
11
56°
31°
12
60°
31°
13
61°
38°
14
56°
32°
15
55°
32°
16
55°
33°
17
56°
34°
18
54°
34°
19
60°
41°
20
63°
38°
21
58°
35°
22
57°
35°
23
59°
37°
24
58°
36°
25
60°
38°
26
59°
37°
27
59°
36°
28
61°
45°
29
69°
46°
30
71°
46°
31
66°
43°
1
64°
40°
2
65°
42°
3
63°
41°
4
63°
43°
5
68°
42°
6
64°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Plaster Rock
Plaster Rock's May 2026 forecast shows daily high temperatures ranging from 47° to 71°, with overnight lows between 31° and 46°. The average high for May is 59° with an average low of 37°. 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 Plaster Rock. See also: June | July | August.