S
M
T
W
T
F
S
26
93°
69°
27
72°
53°
28
72°
51°
29
73°
56°
30
71°
59°
1
76°
61°
2
87°
58°
3
81°
61°
4
90°
63°
5
74°
63°
6
76°
55°
7
78°
54°
8
74°
56°
9
75°
53°
10
94°
55°
11
75°
60°
12
89°
60°
13
74°
62°
14
70°
54°
15
72°
56°
16
74°
58°
17
79°
58°
18
74°
58°
19
76°
64°
20
76°
61°
21
76°
60°
22
78°
60°
23
74°
60°
24
75°
59°
25
75°
59°
26
85°
59°
27
75°
65°
28
74°
65°
29
73°
62°
30
72°
60°
31
76°
58°
1
80°
59°
2
88°
61°
3
71°
61°
4
66°
58°
5
64°
54°
6
69°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Port Saint Johns
Port Saint Johns's May 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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 Port Saint Johns. See also: June | July | August.
