S
M
T
W
T
F
S
26
34°
30°
27
35°
24°
28
41°
22°
29
47°
29°
30
44°
33°
1
43°
36°
2
44°
37°
3
50°
38°
4
45°
37°
5
55°
41°
6
57°
37°
7
49°
39°
8
45°
35°
9
46°
39°
10
54°
39°
11
52°
36°
12
48°
40°
13
46°
32°
14
45°
33°
15
47°
35°
16
47°
33°
17
48°
33°
18
51°
39°
19
52°
39°
20
49°
40°
21
49°
40°
22
56°
39°
23
50°
38°
24
50°
37°
25
51°
39°
26
50°
37°
27
51°
39°
28
50°
38°
29
50°
37°
30
51°
40°
31
51°
40°
1
52°
39°
2
52°
40°
3
53°
40°
4
52°
41°
5
52°
40°
6
53°
40°
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 43° to 57°, with overnight lows between 29° and 41°. The average high for May is 50° with an average low of 38°. 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.
