S
M
T
W
T
F
S
26
86°
78°
27
84°
76°
28
83°
77°
29
84°
77°
30
85°
77°
1
86°
78°
2
87°
76°
3
86°
75°
4
87°
76°
5
88°
76°
6
87°
76°
7
88°
77°
8
84°
78°
9
85°
79°
10
85°
78°
11
84°
79°
12
84°
79°
13
85°
78°
14
84°
79°
15
83°
79°
16
84°
78°
17
85°
79°
18
85°
79°
19
86°
78°
20
84°
79°
21
85°
79°
22
85°
80°
23
86°
79°
24
85°
80°
25
85°
80°
26
86°
79°
27
85°
80°
28
85°
80°
29
86°
79°
30
85°
80°
31
85°
80°
1
86°
79°
2
85°
80°
3
85°
80°
4
86°
81°
5
86°
80°
6
87°
80°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in St John
St John's May 2026 forecast shows daily high temperatures ranging from 83° to 88°, with overnight lows between 75° and 81°. The average high for May is 85° with an average low of 79°. 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.
