S
M
T
W
T
F
S
26
34°
30°
27
35°
24°
28
41°
22°
29
46°
28°
30
46°
28°
1
47°
34°
2
45°
38°
3
58°
38°
4
47°
38°
5
59°
38°
6
68°
48°
7
60°
43°
8
51°
43°
9
58°
39°
10
57°
39°
11
49°
36°
12
49°
43°
13
55°
41°
14
54°
40°
15
51°
38°
16
52°
37°
17
49°
37°
18
52°
38°
19
51°
41°
20
49°
40°
21
52°
39°
22
52°
39°
23
50°
40°
24
56°
40°
25
56°
41°
26
50°
41°
27
54°
40°
28
54°
39°
29
52°
38°
30
51°
39°
31
51°
39°
1
54°
42°
2
60°
43°
3
55°
43°
4
57°
40°
5
53°
40°
6
56°
41°
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 49° to 68°, with overnight lows between 36° and 48°. The average high for May is 54° with an average low of 40°. 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.
