S
M
T
W
T
F
S
26
68°
39°
27
65°
49°
28
61°
48°
29
51°
40°
30
50°
34°
1
46°
34°
2
49°
30°
3
59°
42°
4
76°
49°
5
59°
43°
6
55°
36°
7
58°
36°
8
62°
35°
9
70°
41°
10
60°
35°
11
58°
34°
12
66°
30°
13
57°
34°
14
58°
35°
15
70°
34°
16
77°
60°
17
85°
57°
18
82°
66°
19
79°
56°
20
58°
45°
21
67°
44°
22
75°
49°
23
64°
53°
24
64°
49°
25
80°
44°
26
78°
52°
27
81°
52°
28
73°
51°
29
76°
49°
30
78°
47°
31
71°
52°
1
67°
51°
2
71°
50°
3
75°
57°
4
81°
63°
5
83°
64°
6
82°
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 67° to 83°, with overnight lows between 50° and 65°. The average high for May is 76° with an average low of 57°. 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.
