S
M
T
W
T
F
S
29
46°
16°
30
66°
28°
31
49°
39°
1
48°
34°
2
44°
33°
3
54°
34°
4
60°
38°
5
45°
38°
6
40°
28°
7
36°
23°
8
47°
16°
9
63°
22°
10
71°
35°
11
47°
32°
12
53°
25°
13
63°
41°
14
66°
50°
15
67°
54°
16
71°
55°
17
68°
48°
18
65°
47°
19
57°
31°
20
38°
19°
21
46°
25°
22
54°
31°
23
56°
37°
24
57°
38°
25
60°
38°
26
57°
35°
27
55°
46°
28
54°
35°
29
56°
32°
30
57°
33°
1
56°
32°
2
53°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in St. Johnsbury
St. Johnsbury's April 2026 forecast shows daily high temperatures ranging from 38° to 71°, with overnight lows between 19° and 55°. The average high for April is 58° 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 April weather will actually feel in St. Johnsbury. See also: May | June | July.