S
M
T
W
T
F
S
26
64°
51°
27
55°
36°
28
57°
35°
29
58°
35°
30
53°
34°
1
50°
33°
2
57°
37°
3
61°
41°
4
60°
40°
5
61°
38°
6
64°
42°
7
57°
36°
8
56°
37°
9
57°
37°
10
58°
45°
11
59°
47°
12
60°
42°
13
58°
41°
14
58°
41°
15
60°
42°
16
61°
42°
17
64°
46°
18
62°
41°
19
62°
41°
20
63°
46°
21
65°
50°
22
67°
44°
23
63°
45°
24
63°
43°
25
64°
44°
26
64°
47°
27
65°
46°
28
66°
50°
29
67°
54°
30
67°
49°
31
71°
51°
1
74°
56°
2
76°
57°
3
77°
57°
4
74°
54°
5
77°
57°
6
74°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in St. Joseph
St. Joseph's May 2026 forecast shows daily high temperatures ranging from 50° to 77°, with overnight lows between 33° and 58°. The average high for May is 63° with an average low of 44°. 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. Joseph. See also: June | July | August.
