S
M
T
W
T
F
S
26
74°
45°
27
63°
57°
28
61°
52°
29
59°
43°
30
61°
38°
1
56°
42°
2
55°
38°
3
64°
42°
4
75°
51°
5
57°
47°
6
57°
39°
7
60°
36°
8
66°
50°
9
76°
51°
10
64°
42°
11
66°
41°
12
69°
50°
13
63°
40°
14
67°
49°
15
73°
53°
16
76°
52°
17
77°
54°
18
79°
59°
19
78°
58°
20
79°
61°
21
86°
65°
22
68°
50°
23
70°
52°
24
71°
53°
25
71°
54°
26
72°
52°
27
73°
53°
28
73°
54°
29
75°
57°
30
79°
58°
31
80°
61°
1
80°
61°
2
77°
58°
3
82°
63°
4
83°
64°
5
83°
64°
6
80°
65°
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 63° to 86°, with overnight lows between 40° and 65°. The average high for May is 75° with an average low of 55°. 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.
