S
M
T
W
T
F
S
26
36°
31°
27
37°
29°
28
38°
30°
29
41°
32°
30
44°
34°
1
43°
33°
2
44°
35°
3
43°
41°
4
46°
36°
5
47°
36°
6
48°
35°
7
49°
35°
8
44°
34°
9
44°
31°
10
45°
31°
11
45°
35°
12
46°
37°
13
50°
37°
14
49°
38°
15
50°
39°
16
52°
37°
17
48°
38°
18
48°
39°
19
50°
40°
20
55°
41°
21
55°
41°
22
50°
40°
23
54°
41°
24
56°
38°
25
49°
34°
26
50°
35°
27
50°
36°
28
51°
35°
29
51°
39°
30
53°
36°
31
50°
37°
1
56°
42°
2
57°
39°
3
58°
40°
4
57°
41°
5
56°
44°
6
58°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in St. John's
St. John's's May 2026 forecast shows daily high temperatures ranging from 36° to 58°, with overnight lows between 29° and 44°. The average high for May is 49° 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 St. John's. See also: June | July | August.
