S
M
T
W
T
F
S
26
59°
30°
27
61°
26°
28
64°
31°
29
55°
37°
30
60°
39°
1
54°
44°
2
62°
40°
3
48°
35°
4
58°
42°
5
63°
48°
6
57°
49°
7
55°
47°
8
54°
36°
9
59°
37°
10
58°
38°
11
57°
41°
12
58°
40°
13
60°
39°
14
58°
42°
15
60°
38°
16
64°
42°
17
63°
41°
18
59°
43°
19
64°
43°
20
64°
42°
21
63°
44°
22
64°
45°
23
63°
44°
24
64°
44°
25
61°
43°
26
60°
44°
27
63°
45°
28
64°
45°
29
60°
44°
30
61°
45°
31
63°
46°
1
61°
46°
2
65°
44°
3
62°
46°
4
66°
46°
5
62°
45°
6
64°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Petitcodiac
Petitcodiac's May 2026 forecast shows daily high temperatures ranging from 48° to 66°, with overnight lows between 35° and 49°. The average high for May is 61° 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 May weather will actually feel in Petitcodiac. See also: June | July | August.