S
M
T
W
T
F
S
26
75°
56°
27
72°
50°
28
61°
44°
29
64°
41°
30
67°
37°
1
64°
36°
2
66°
45°
3
80°
51°
4
81°
51°
5
65°
47°
6
60°
38°
7
64°
44°
8
73°
49°
9
74°
54°
10
71°
48°
11
72°
52°
12
69°
53°
13
76°
63°
14
70°
56°
15
69°
55°
16
69°
58°
17
74°
59°
18
76°
59°
19
77°
60°
20
80°
61°
21
78°
60°
22
79°
55°
23
71°
53°
24
69°
55°
25
72°
56°
26
73°
54°
27
72°
55°
28
73°
54°
29
74°
58°
30
81°
64°
31
77°
64°
1
84°
65°
2
81°
65°
3
83°
62°
4
77°
61°
5
77°
57°
6
76°
57°
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 60° to 84°, with overnight lows between 36° and 65°. The average high for May is 74° 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.
