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
N/A
19
73°
62°
20
74°
63°
21
77°
61°
22
72°
66°
23
74°
59°
24
73°
62°
25
71°
55°
26
65°
52°
27
77°
55°
28
75°
58°
29
75°
60°
30
77°
62°
31
74°
56°
1
76°
56°
2
71°
54°
3
70°
53°
4
76°
58°
5
75°
55°
6
67°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Port Saint Johns
Port Saint Johns's May 2026 forecast shows daily high temperatures ranging from 65° to 77°, with overnight lows between 52° and 66°. The average high for May is 73° with an average low of 58°. 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.
