S
M
T
W
T
F
S
26
75°
56°
27
72°
50°
28
61°
44°
29
64°
41°
30
68°
39°
1
67°
33°
2
66°
34°
3
80°
49°
4
89°
50°
5
59°
50°
6
62°
44°
7
74°
41°
8
66°
48°
9
89°
43°
10
73°
52°
11
84°
46°
12
87°
56°
13
81°
46°
14
83°
50°
15
94°
63°
16
91°
64°
17
84°
64°
18
82°
53°
19
66°
48°
20
67°
54°
21
61°
58°
22
70°
55°
23
77°
57°
24
80°
60°
25
83°
64°
26
80°
65°
27
81°
63°
28
82°
63°
29
81°
60°
30
83°
61°
31
85°
68°
1
85°
64°
2
83°
63°
3
77°
60°
4
78°
60°
5
83°
65°
6
83°
66°
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 61° to 85°, with overnight lows between 48° and 68°. The average high for May is 78° with an average low of 60°. 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.
