S
M
T
W
T
F
S
26
60°
49°
27
71°
52°
28
65°
41°
29
65°
39°
30
60°
45°
1
70°
43°
2
71°
44°
3
87°
48°
4
87°
55°
5
66°
44°
6
57°
43°
7
80°
39°
8
80°
50°
9
87°
48°
10
72°
50°
11
80°
43°
12
94°
55°
13
84°
57°
14
95°
63°
15
96°
63°
16
94°
65°
17
96°
67°
18
94°
52°
19
66°
45°
20
67°
47°
21
67°
55°
22
73°
58°
23
77°
56°
24
88°
55°
25
90°
60°
26
87°
62°
27
80°
62°
28
74°
64°
29
84°
69°
30
89°
68°
31
N/A
1
93°
66°
2
83°
65°
3
79°
66°
4
82°
65°
5
82°
66°
6
86°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in St. John
St. John's May 2026 forecast shows daily high temperatures ranging from 79° to 93°, with overnight lows between 65° and 66°. The average high for May is 84° with an average low of 66°. 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 St. John. See also: June | July | August.
