S
M
T
W
T
F
S
26
66°
48°
27
71°
51°
28
58°
48°
29
54°
41°
30
51°
39°
1
49°
36°
2
52°
37°
3
58°
41°
4
57°
44°
5
58°
45°
6
58°
47°
7
63°
48°
8
59°
47°
9
62°
43°
10
60°
42°
11
60°
44°
12
62°
44°
13
61°
41°
14
60°
40°
15
60°
41°
16
62°
42°
17
62°
43°
18
69°
53°
19
68°
47°
20
64°
43°
21
64°
44°
22
65°
46°
23
67°
51°
24
74°
55°
25
74°
53°
26
66°
48°
27
66°
47°
28
68°
52°
29
74°
55°
30
76°
56°
31
77°
57°
1
77°
57°
2
78°
58°
3
79°
58°
4
78°
54°
5
70°
50°
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 49° to 79°, with overnight lows between 36° and 58°. The average high for May is 65° with an average low of 47°. 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.
