S
M
T
W
T
F
S
26
53°
40°
27
52°
39°
28
54°
38°
29
53°
34°
30
58°
37°
1
60°
42°
2
66°
38°
3
57°
36°
4
55°
36°
5
55°
34°
6
58°
35°
7
57°
37°
8
56°
38°
9
57°
36°
10
57°
36°
11
64°
41°
12
61°
39°
13
60°
37°
14
61°
38°
15
61°
37°
16
60°
38°
17
63°
48°
18
70°
48°
19
63°
46°
20
64°
42°
21
68°
48°
22
66°
40°
23
66°
42°
24
72°
42°
25
73°
49°
26
74°
50°
27
75°
51°
28
77°
51°
29
76°
50°
30
74°
52°
31
68°
52°
1
68°
51°
2
69°
53°
3
69°
50°
4
76°
45°
5
74°
55°
6
77°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in St. Johnsbury
St. Johnsbury's May 2026 forecast shows daily high temperatures ranging from 52° to 77°, with overnight lows between 34° and 55°. The average high for May is 64° with an average low of 43°. 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. Johnsbury. See also: June | July | August.
