S
M
T
W
T
F
S
26
84°
74°
27
85°
74°
28
84°
73°
29
84°
74°
30
85°
74°
1
84°
73°
2
85°
74°
3
84°
74°
4
84°
75°
5
85°
74°
6
84°
75°
7
84°
75°
8
85°
74°
9
84°
75°
10
84°
75°
11
85°
76°
12
85°
76°
13
86°
75°
14
85°
76°
15
85°
76°
16
86°
75°
17
86°
75°
18
88°
73°
19
87°
73°
20
88°
74°
21
88°
73°
22
89°
73°
23
87°
74°
24
87°
73°
25
88°
73°
26
87°
74°
27
87°
74°
28
88°
75°
29
89°
74°
30
88°
74°
31
89°
75°
1
88°
74°
2
89°
75°
3
88°
74°
4
88°
74°
5
89°
75°
6
88°
74°
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 84° to 89°, with overnight lows between 73° and 76°. The average high for May is 86° with an average low of 74°. 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.
